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

Q: customer: Hi. 
 agent: Hello, how may I serve you today? 
 customer: Owing to an emergency I want to cancel my reservation, can you help me? 
 agent: Sure, can you please provide your name? 
 customer: I am Gregory Adams. 
 agent: Hold on a minute. 
 customer: Sure. 
 agent: We found your reservation and it has been cancelled successfully. 
 customer: Thank you for your help. 
 agent: Thank you for choosing us.

A: cancel
****
Q: customer: Hello. 
 agent: Hi. How can I help you? 
 customer: Myself Stephen Parker. I want to travel from DEN to JFK, can you please book a flight ticket for me? 
 agent: Sure, may I know your date please? 
 customer: I want to travel from 06/10 to 06/12 dates. 
 agent: Hawaiian airlines is matching you with 1029 flight number, can I proceed for booking? 
 customer: Sure, please proceed it. 
 agent: Your booking is confirmed. 
 customer: Thank you so much. 
 agent: Thank you, have a safe journey.

A: book
****
Q: customer: Hi. I am Michelle Thompson. 
 agent: Hello, how may I guide you today? 
 customer: I have to submit my research record at Houston university with my college friend from New York. Will you please help me in making an airline reservation? 
 agent: Sure, I will help you. Could you please provide me your airport codes? 
 customer: My source code is NY-EWR and destination code is TX-IAH. 
 agent: When you have planned to travel? 
 customer: My planned dates are 12/11 and 12/13. 
 agent: Kindly mention your fare limit? 
 customer: Fare limit is under 5000. 
 agent: We found a flight with Southwest airline and 1000 flight with fare 100 having a lay by. 
 customer: You can continue with booking. 
 agent: Your ticked has been confirmed. 
 customer: Thank you for your kind service. 
 agent: Thank you for picking us, have a great day.

A:
book
****