Instructions: 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
Input: customer: Hi, Brenda Parker here. 
 agent: Hello, how can I support you today? 
 customer: I planned a trip to Austin with my friends, meanwhile I want to participate in Austin Brewery tour. Can you help me in booking? 
 agent: Sure, I am blissful to help you. Can you please provide your journey airport codes? 
 customer: NY - EWR, New York is origin. TX - AUS, Austin, is destination. 
 agent: Ok, please provide your journey dates. 
 customer: I want to move on 03/10. I will return on 03/12. 
 agent: Ok, May I know your price? 
 customer: I can afford only 200. 
 agent: Ok, please standby. 
 customer: Sure, I will. 
 agent: Thank you for being patient, we found a flight in 1019 JetBlue plane with a fare of 100. Can I proceed for booking with a halt? 
 customer: I am very happy with the flight, please proceed. 
 agent: Sure, your ticket has been reserved. Thank you for choosing us. 
 customer: Thanks for your support. 
 agent: Have a nice day.
Output:
book