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: Hi, I am Emily Martinez. 
 agent: Hello, how can I help you? 
 customer: I want to book a flight ticket on 10/07 and return on 10/09, can you please help me with it? 
 agent: Sure, may I know your airport codes? 
 customer: Ok, my airport codes are NY-JFK and TX-DFW. 
 agent: How much you can afford for the ticket? 
 customer: I can afford up to 500. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: There is a AA 1006 airline with fare of 200 which matches your travelling dates. Shall I proceed with booking? 
 customer: Please proceed. 
 agent: Your booking has been confirmed on name of Emily Martinez. 
 customer: Thank you. 
 agent: Thank you for approaching us.
A:
book