Teacher:In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello. How may I assist you today? 
 customer: Can you please help me to search a flight with 0 connection limit? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Could you please provide your nearest airport codes for booking? 
 customer: Sure, the corresponding airport codes are from WA-SEA to PA-PHL. 
 agent: Ok, may I know your preferable dates of travelling? 
 customer: The preferable dates are 07/31 to 08/02. 
 agent: On whose name I have to book this flight ticket? 
 customer: Please book the ticket on the name of Jeffrey Campbell. 
 agent: Please give me some time to check the flights. 
 customer: Sure, take your time. 
 agent: Based on your information, flight number 1012 from Southwest airlines with 1 connection with the fare of 100 is available for you. Shall I proceed with this? 
 customer: No, I want the direct flight. 
 agent: Sorry, there are no direct flights available with your requested dates of travelling. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for reaching us, have a great day.
Student:
no_flight