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: Hi, I am Daniel Taylor. 
 agent: Hello. How may I oblige you today? 
 customer: I intend to fly from New York, NY - EWR to meet my old friend at central park. Can you help me book a flight ticket for my round trip? 
 agent: Sure, please let me know your connection limit. 
 customer: I prefer a connecting flight within my journey. 
 agent: Could you please let me know your travelling dates. 
 customer: They are planned to be on 03/15 and 03/17. 
 agent: Please wait a minute. 
 customer: Sure. 
 agent: We found an airline matching your details with the flight number-1000 with one connection and the price 100. 
 customer: Ok, go ahead for booking. 
 agent: Your ticket is confirmed. 
 customer: Thank you for the help. 
 agent: Thanks for choosing us.
Output:
book