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 assist you? 
 customer: Can you please help me in booking a flight ticket from BOS to LAS? 
 agent: Sure, I am here to help you. Can you please help me with your planned travel dates? 
 customer: I want to fly on Mar 01 and return on Mar 03. 
 agent: May I know your name please to proceed further? 
 customer: Myself James Rodriguez. 
 agent: Do you need a connecting flight or a direct flight? 
 customer: I need a single connection. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: I found an economy class in Delta airlines with fare 100 and it has single connection. Can I book your ticket? 
 customer: You can proceed to booking. 
 agent: Ok, your booking is confirmed with flight number 1000. 
 customer: Thank you. 
 agent: Thank you for choosing us, have a nice day.
Output:
book