Detailed 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
Problem:customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I am Matthew Allen, want to travel from EWR to HOU. Will you please help me in booking my ticket? 
 agent: Sure, can you provide your travel dates? 
 customer: My travelling dates will be from 04/17 to 04/19. 
 agent: Please wait. 
 customer: Sure. 
 agent: Thank you for your patience, there is a flight for you with number 1027 in JetBlue airline. Shall I proceed? 
 customer: Great, please proceed with the booking. 
 agent: Sure, your ticket has been booked. 
 customer: Thank you for your service. 
 agent: Thank you for reaching us.
Solution:
book