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: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: Edward Young here. 
 agent: How may I assist you today? 
 customer: I would like to visit New York to meet my old friend there, so can you please help me out with booking of a flight ticket? 
 agent: Sure, when would you like to fly? 
 customer: I would like to fly on 08/13 and please book a return ticket on 08/15. 
 agent: Ok, please provide your airport codes that you want to travel. 
 customer: Sure, I want to travel from AUS to JFK. 
 agent: Please give me a moment. 
 customer: Sure, take your time to check. Please ensure that flight should be with single connection. 
 agent: Thank you for waiting. 
 customer: No problem. 
 agent: There is no flights found as per your requested details. 
 customer: Oh! so sad to hear. Anyway, thank you for the information. 
 agent: Welcome, have a great day.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: I am Andrew Thompson. Can you please book a flight ticket from LGA to LAX? 
 agent: Ok, please provide your journey dates too. 
 customer: Sure, I need to travel on dates of 12/06 and 12/08. 
 agent: Please wait a moment, I will revert you back with the proper information. 
 customer: Sure, take your time. 
 agent: There is a connecting flight-1012 on UA airlines, would you like me to proceed? 
 customer: That is fine, please proceed with booking. 
 agent: Your ticket has been done with your criteria. 
 customer: Thank you for your help. 
 agent: Thanks for choosing us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello. How may I help you at this minute? 
 customer: Can you help me in changing my recent reservation with the name Gary Thompson? 
 agent: Sure, I am here to help you with that. 
 customer: Thank you. 
 agent: Ok, may I know your name? 
 customer: I am Gary Thompson. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: Sorry to say that, there is no reservation found on your name in our database. 
 customer: Its ok, thank you. 
 agent: Thank you for reaching us.
Output: no_reservation