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 Jennifer White. 
 agent: Hello, How can I assist you today? 
 customer: I want a connecting flight to NV - LAS from NY - LGA. Can you please help me in booking a flight ticket? 
 agent: Sure, we are here to help you. Please provide your price limit. 
 customer: The price limit should not exceed 1000 with single connection. 
 agent: Sure, please provide your journey dates. 
 customer: My depart day will be on 12/29 and arrival day is on 12/31. 
 agent: Ok, please wait for a moment. 
 customer: Ok. 
 agent: Thank you for your patience, we are happy to say that there is a flight found with flight number 1029 and price is 100. The airline is AA. 
 customer: You can proceed with this airline. 
 agent: Sure, your ticket has been confirmed. 
 customer: Thanks for your information. 
 agent: Thank you for reaching us.
Output:
book