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: I need to visit Phoenix, AZ - PHX to celebrate festival with my parents. 
 agent: Sure, I am here to help you. May I know your travelling dates? 
 customer: My travelling dates are departure on 01/07 and return on 01/09. Make sure that I need one connection. 
 agent: May I know your name? 
 customer: Shirley Lewis is my name. 
 agent: May I know your airport abbreviates? 
 customer: My origin is New York, NY - EWR. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: There is a JetBlue airline which matches your requirements. 
 customer: May I know the flight details? 
 agent: The flight details are flight number : 1001, Price : 200 and with 1 connection. Shall I proceed with booking? 
 customer: Yes, you can proceed. 
 agent: Your booking has been confirmed. 
 customer: Thanks for booking my ticket. 
 agent: Thank you for contacting us.
Output:
book