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
Q: customer: Hello. 
 agent: Hello, how can I guide you? 
 customer: This is Elizabeth Jackson. Could you please help me to book a flight ticket? 
 agent: Sure, may I know your source and destination codes? 
 customer: My origin airport is CA-LAX and destination code is DC-IAD. 
 agent: OK, could you please provide your planned dates? 
 customer: My departure day is on 09/30 and return would be on 10/02. 
 agent: OK, I got a flight having airline name as JetBlue, flight number is 1029, price as 100. 
 customer: Is it 1 connection flight? 
 agent: Yes,this flight is having one connection. 
 customer: OK, then please proceed for booking. 
 agent: OK, your booking process had completed. 
 customer: Thank you. 
 agent: Have a safe journey.
A:
book