Definition: 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? 
 customer: My name is Deborah Adams. I need your help in booking a flight ticket from ATL to PHL. 
 agent: May I know your travel dates please? 
 customer: Sure, my departure date is on 06/26 and the return date is 06/28. 
 agent: OK, please wait a moment. 
 customer: Sure. Please make sure that the price limit should not exceed 500 and the connection limit should be 1. 
 agent: I found a flight for you with flight number 1021 and airline is Southwest. 
 customer: Thank you for the details. 
 agent: The price is 200 with single connection. Shall I book it? 
 customer: Yes, please. 
 agent: I have booked your ticket. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us, have a safe journey.
Output:
book