Given the task definition and input, reply with output. In this task, you are given a conversation, and your task is to generate a summary from the information present in the given conversation. Generate a summary in such a way that the context should be present in the conversation. It should cover the complete context of the conversation. 

 Ruth: Chris, don't forget about Nathan's appt, Chris: Today?, Ruth: Yes, I told you last night! 4:30, Chris: Oh boy,  I'm gonna have to leave work early., Ruth: Just tell them you'll work it off later at home., Chris: Fine, just tell him to be ready at 4 

 Chris is having an appointment with Nathan today at 4:30. 