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 may I assist you today? 
 customer: I am Brain Baker, I want to book a flight from NY-LGA airport to DC-DCA airport to watch base ball game with my friends. Can you book a connecting flight for me? 
 agent: Sure, could you please share your travelling dates? 
 customer: I plan to travel on 03/03 and return on 03/05. 
 agent: May I know your budget for ticket? 
 customer: My budget is 5000. 
 agent: Ok, please hold a moment. 
 customer: Sure. 
 agent: We have found a connected flight of Hawaiian airline, flight number-1005 and fare is 200. 
 customer: Please proceed with booking. 
 agent: Sure, your seat has been confirmed. 
 customer: Thank you for helping me. 
 agent: Thank you for opting us.
A:
book