Q: 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
customer: Hello. 
 agent: Hello, how can I aid you? 
 customer: I am Jennifer Clark. I need to reach San Francisco to attend a party meeting. Can you book me a ticket from JFK to SFO? 
 agent: Sure, we are willing to help you. May I know your connection preference? 
 customer: I need a single lay by. 
 agent: Ok, what are your planned dates to travel? 
 customer: I would start on 06/30 and return on 07/02. 
 agent: Ok, let me check the availability of flights on your route. 
 customer: Ok. 
 agent: Jennifer Clark, we found a connecting flight in UA airline at a price of 100 in economy class and flight number is 1018. 
 customer: Fine, please proceed. 
 agent: Shall I proceed? 
 customer: Yes. 
 agent: Your booking was done. 
 customer: Thanks for your support. 
 agent: Thank you for choosing us.
A:
book