An embodiment of the invention provides a method for enhanced e-mail return receipts based on cognitive considerations. An input device receives an expected response time from a sender of an electronic message, wherein the expected response time includes the amount of time that the sender expects to receive a response to the electronic message. A processor generates a likelihood that the recipient of the electronic message will respond to the electronic message within the expected response time based on a profile of the recipient. The profile of the recipient includes the recipient's degree of attentiveness to the electronic message, the recipient's workload, the recipient's efficiency, and the recipient's work habits. A communications device presents the likelihood that the recipient will respond to the electronic message within the expected response time to the sender.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method comprising: receiving an expected response time from a sender of an electronic message with an input device, the expected response time including an amount of time that the sender expects to receive a response to the electronic message; generating a likelihood that a recipient of the electronic message will respond to the electronic message within the expected response time with a processor, the likelihood that the recipient of the electronic message will respond to the electronic message within the expected response time being generated based on a profile of the recipient; and presenting the likelihood that the recipient will respond to the electronic message within the expected response time to the sender with a communications device. 2. The method according to claim 1, wherein the profile of the recipient includes at least one measure of at least one of: a recipient's degree of attentiveness to the electronic message, a recipient's workload, a recipient's efficiency, and a recipient's work habits 3. The method according to claim 1, wherein the recipient's degree of attentiveness to the electronic message is based on at least one of: an amount of the electronic message that was scrolled after opening; a number of times that the electronic message was opened; a number of times that the recipient viewed the electronic message as determined by a gaze detection device directed at the recipient; and input from the recipient indicating that the recipient acknowledges receipt and comprehension of the electronic message. 4. The method according to claim 3, further comprising presenting an attentiveness indicator to the sender with an electronic alerting system, the attentiveness indicator indicating the recipient's degree of attentiveness by at least one of an audio indicator and a visual indicator, wherein the attentiveness indicator is not sent to the sender's e-mail inbox. 5. The method according to claim 1, wherein a measure of the recipient's efficiency includes an amount of time needed by the recipient to read an electronic message, wherein the recipient's efficiency is at least one of: learned by a system by monitoring electronic messages over time received and sent by the recipient, and entered into the system by a user. 6. The method according to claim 1, wherein the recipient's work habits include a numerical score indicating a tendency over time of the recipient to get interrupted from completing a task. 7. The method according to claim 1, wherein said generating of the likelihood that a recipient of the electronic message will respond to the electronic message within the expected response time includes: generating numerical scores for each of the recipient's degree of attentiveness over time to the electronic message, the recipient's workload over time, the recipient's efficiency over time, and the recipient's work habits over time; and combining by a function the numerical scores to generate the likelihood that a recipient of the electronic message will respond to the electronic message. 8. The method according to claim 7, wherein at least one of the numerical scores is a real value stored in a cloud resource. 9. The method according to claim 7, further comprising weighing at least one of the numerical scores by an importance coefficient. 10. The method according to claim 7, further comprising weighing at least one of the numerical scores by function of time. 11. The method according to claim 1, further comprising: calculating a measure of central tendency and a measure of variance of response time for the recipient, the measures of response time including an amount of time between a time that an electronic message was sent to the recipient and a time that the recipient responds to the electronic message; and sending an alert to at least one of a sender of a new electronic message and work associates of the recipient when the recipient does not respond to the new electronic message within a period equal to the measure of central tendency of response time plus some multiple of the measure of variation after the new electronic message was sent to the recipient. 12. A method comprising: receiving an expected response time from a sender of an electronic message with an input device, the expected response time including an amount of time that the sender expects to receive a response to the electronic message; generating a likelihood that a recipient of the electronic message will respond to the electronic message within the expected response time with a processor, the likelihood that the recipient of the electronic message will respond to the electronic message within the expected response time being generated based on a profile of the recipient, the profile of the recipient including: a recipient's degree of attentiveness to the electronic message, a recipient's workload, a recipient's efficiency, and a recipient's work habits; and presenting the likelihood that the recipient will respond to the electronic message within the expected response time to the sender with a communications device. 13. The method according to claim 12, wherein the recipient's degree of attentiveness to the electronic message is based on: an amount of the electronic message that was scrolled after opening; a number of times that the electronic message was opened; a number of times that the recipient viewed the electronic message as determined by a gaze detection device directed at the recipient; and input from the recipient indicating that the recipient acknowledges receipt and comprehension of the electronic message. 14. The method according to claim 13, further comprising presenting an attentiveness indicator to the sender, the attentiveness indicator indicating the recipient's degree of attentiveness by an audio indicator and a visual indicator without text, wherein the attentiveness indicator is not sent to the sender's e-mail inbox. 15. The method according to claim 12, wherein the recipient's efficiency includes an average amount of time needed by the recipient to read an electronic message, wherein the recipient's efficiency is: learned by a system by monitoring electronic messages received and sent by the recipient, and entered into the system by a user. 16. The method according to claim 12, wherein the recipient's work habits include a numerical score indicating a tendency of the recipient to get interrupted from completing a task. 17. The method according to claim 12, wherein said generating of the likelihood that a recipient of the electronic message will respond to the electronic message within the expected response time includes: generating numerical scores for each of the recipient's degree of attentiveness to the electronic message, the recipient's workload, the recipient's efficiency, and the recipient's work habits; and factoring the numerical scores to generate the likelihood that a recipient of the electronic message will respond to the electronic message. 18. The method according to claim 17, further comprising weighing the numerical scores by an importance coefficient. 19. The method according to claim 12, further comprising: calculating an average response time for the recipient, the average response time including an average amount of time between a time that an electronic message was sent to the recipient and a time that the recipient responds to the electronic message; and sending an alert to a sender of a new electronic message and work associates of the recipient when the recipient does not respond to the new electronic message within the average response time after the new electronic message was sent to the recipient. 20. A computer program product comprising: a computer readable storage medium having stored thereon: first program instructions executable by a device to cause the device to receive an expected response time from a sender of an electronic message, the expected response time including an amount of time that the sender expects to receive a response to the electronic message; second program instructions executable by the device to cause the device to generate a likelihood that a recipient of the electronic message will respond to the electronic message within the expected response time based on a profile of the recipient, the profile of the recipient including at least one of: a recipient's degree of attentiveness to the electronic message, a recipient's workload, a recipient's efficiency, and a recipient's work habits; and second program instructions executable by the device to cause the device to present the likelihood that the recipient will respond to the electronic message within the expected response time to the sender.