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: I am Larry Turner. 
 agent: How may I address you today? 
 customer: As, there is a food festival is going to be held in Charlotte, CLT so, I want to my food stall in that festival. So, I need your assistance in booking my flight ticket from Boston, BOS. 
 agent: Sure, is there any connection preference? 
 customer: I am comfortable to travel in any flight. 
 agent: Can I know your preferable travelling dates? 
 customer: My schedule dates are 03/24 - 03/26. 
 agent: Please wait a moment I will check and revert to you. 
 customer: Sure. 
 agent: We found a Delta airline matching your details with the connecting flight and the price 200. 
 customer: You can proceed with my booking. 
 agent: Your booking has been confirmed. 
 customer: Thank you for kind service. 
 agent: Thanks for choosing us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: Can you please help me in booking a flight ticket from Denver, DEN to Phoenix, PHX? 
 agent: Sure, help me with the trip dates? 
 customer: My journey dates are from Aug 15 to Aug 17. 
 agent: Do you have any specifications to be met? 
 customer: No. 
 agent: May I know your name for the documentation purpose? 
 customer: My name is Kevin Harris. 
 agent: We found a flight in an airline Hawaiian with 1026 number having a single connection in an economy class. Shall I proceed to book? 
 customer: Sure, you can proceed for booking. 
 agent: Your flight ticket has been confirmed. 
 customer: Thanks for your help. 
 agent: Thank you for opting us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello. May I know you name? 
 customer: I am Debora Nelson, I am planning a trip for my cousin's engagement from LAS -EWR can you find a ticket for me? 
 agent: It's good to hear, could you provide your journey dates? 
 customer: Sure, my travelling dates are 03/20 to 03/22. 
 agent: Sorry Nelson, we could not found any flight as per your requested information. 
 customer: OK, thank you. 
 agent: OK, thank you for reaching us. Have a great day Nelson.
Output: no_flight