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 can I assist you? 
 customer: My name is John Smith. 
 agent: Yes, John. 
 customer: I want to book a flight ticket to LGA, can you help me? 
 agent: Sure, may I know your origin airport code? 
 customer: Sure, my source code is JFK. 
 agent: Ok, please provide me your travelling dates. 
 customer: My travelling dates are from 01/13 to 01/15. 
 agent: John, give me a moment. 
 customer: Make sure I need 1 connection for my flight. 
 agent: Ok, let me check with your required details. 
 customer: Ok.. 
 agent: John, happy to say you that there is an available ticket at your request with Frontier airline and flight number is 1007. Shall I proceed? 
 customer: Yes. 
 agent: Your ticket has successfully booked. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Output:
book