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: Can you please book a flight ticket from AUS to ORD? 
 agent: Sure, may I know your planned travel dates? 
 customer: Thank you. I have planned my travel  dates as Feb 25 and Feb 27. 
 agent: Do you have any limits on number of connections? 
 customer: I am looking for single connecting flight. 
 agent: Do you have any another specifications on your journey? 
 customer: No, I do not have any other specifications. 
 agent: May I know your name for the booking process? 
 customer: Sure, myself Alexander Lopez. 
 agent: American Airlines providing a flight with the price 100 with single connection. Can I proceed for the booking? 
 customer: That is fine, please proceed with booking. 
 agent: Your flight ticket reservation done with the flight number 1024. 
 customer: Thank you for your help. 
 agent: Welcome, thank you for reaching us. 
 customer: Most welcome.
A:
book