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 may I serve you today? 
 customer: I am planning to attend music concert at PHX, can you please help me with booking a flight ticket from IAD? 
 agent: Sure, can you please mention with your dates of journey? 
 customer: I would like to take off on Jan 12 and return on Jan 14. 
 agent: May I know your good name please? 
 customer: My name is Rebecca Thompson. 
 agent: Are you looking for any other help from my side please? 
 customer: I am looking for a connecting flight. 
 agent: Please wait for a mean while. 
 customer: Sure, take your time. 
 agent: I found a connecting flight of fare 200 with the Frontier airline, are you fine with this booking? 
 customer: Yes, please proceed with the booking. 
 agent: Ok, I have reserved your ticket with the flight number 1001. 
 customer: I appreciate your help, thank you. 
 agent: You are welcome, have a safe journey.
Output:
book