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: Hello. 
 agent: Hello. How can I help you today? 
 customer: I would like to spend my weekend time at Las Vegas, please help me in booking a ticket from LGA to LAS. 
 agent: Sure, I will help you in booking. Can you please share your planning dates of journey? 
 customer: My planned journey dates are 04/14 and 04/16. 
 agent: Please wait a moment. 
 customer: Sure, take your time. 
 agent: Flight 1012 i JetBlue airlines is available for you with 1 connection and price is 200. Can I proceed? 
 customer: Ok, please proceed for booking. 
 agent: To proceed further, can you please tell me your name? 
 customer: Sure, my name is Debra Wright. 
 agent: Your booking is confirmed. 
 customer: Thank you for your assistance. 
 agent: Welcome, have a safe flight. Thank you for choosing us.
Output:
book