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. 
 agent: Hello, how may I help you today? 
 customer: Can you book my ticket from LAS to PHL? 
 agent: Sure, let me know your trip dates please. 
 customer: My trip dates are from 02/02 to 02/04. 
 agent: Can I know your name please? 
 customer: Myself Donald Turner. 
 agent: Ok, there is a flight available as per your requested dates in JetBlue airline with 1 connection. Shall I proceed with the booking? 
 customer: Yes, please proceed. 
 agent: Ok, your ticket is confirmed with the flight number 1014. 
 customer: Thank you. 
 agent: Most welcome.
book