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. 
 agent: Hello, how may I aid you? 
 customer: Could you please book a flight ticket from PHX to IAD? 
 agent: Sure, I am here to help you out. Please provide me your trip dates. 
 customer: My trip dates are June 25 and June 27. 
 agent: May I know your name to proceed further? 
 customer: My name is Kathleen Campbell. 
 agent: May I know your connection limit? 
 customer: I need a single connecting flight. 
 agent: Kathleen Campbell, here is a connecting flight in economy class with Frontier airlines. Can I proceed with it? 
 customer: Yes, proceed. 
 agent: Your ticket has been booked with 1025 flight. 
 customer: Thank you. 
 agent: Thank you for reaching us.
A:
book