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 aid you today? 
 customer: I am Carlo Allen, I want to book a flight to Oakland IL-ORS to visit Angle Island with my friend. Can you book a connecting flight for me? 
 agent: Sure, can you please share your budget for airfare? 
 customer: My budget is 500 for flight ticket. 
 agent: Please specify your boarding point? 
 customer: I will fly from Chicago, IL-ORD. 
 agent: May I know when you are willing to travel? 
 customer: I will travel on 09/15 and return on 09/17. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Kindly mention your proper destination code? 
 customer: My destination airport code is CA-OAK. 
 agent: Ok , please wait. 
 customer: Ok. 
 agent: We have found a connected flight of Hawaiian airline, flight number-1001 and fare is 100. 
 customer: Please proceed with booking. 
 agent: Sure, your reservation has been done. 
 customer: Thank you for helping me with booking. 
 agent: Thank you for approaching us.
A:
book