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, Dennis Garcia is my name. 
 agent: Hello, how can I support you? 
 customer: I would like to book a flight ticket to PA - PHL to meet my best friend on her birthday. 
 agent: Sure, can you please provide your scheduled dates? 
 customer: Ok, my scheduled dates are 04/21 to 04/23. 
 agent: Ok, Kindly mention your source point. 
 customer: My source is Chicago, IL - ORD. 
 agent: Ok, May I know your budget? 
 customer: My budget is 5000. 
 agent: Ok, please give me a minute. 
 customer: Sure. 
 agent: Thank you for waiting, There is a flight found in 1012 Spirit plane with a fare of 100. 
 customer: Ok, you can move further. 
 agent: Sure, your ticket has been booked with a connection. 
 customer: Thank you so much. 
 agent: Thank you for approaching us.
Output:
book