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,. I am Kenneth Williams. 
 agent: Hello, how may I aid you today? 
 customer: I would like to visit Lakeside Amusement Park in Denver, DEN, can you please book a flight ticket from ORD? 
 agent: Sure, do you need any layby in between your journey? 
 customer: Yes, I need a lay by in between journey. 
 agent: Let me know your budget for airfare? 
 customer: My budget for airfare is up to 5000. 
 agent: Please specify your scheduled dates of travelling? 
 customer: My departure and arrival dates are, 12/29 and 12/31. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Thank you for your time, unfortunately we have couple of connections on that route. Shall I proceed? 
 customer: Ok, no problem, book this flight for me. 
 agent: Sure, I have booked you at AA airline, flight number-1009 connections-2 and fare is 100. 
 customer: Thank you for booking my ticket. 
 agent: Thank you for opting us.
A:
book