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

Ex 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.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello, how can I support you? 
 customer: Can you please book a ticket from ATL to LGA? As I'm planning to visit Statue of Liberty. 
 agent: Sure, we are here to assist you. May I know your itinerary dates? 
 customer: Sure, my planned departure and return travel dates are 16th and 18th of December. 
 agent: Would you like to travel in business class or economy class? 
 customer: I prefer business class to travel. 
 agent: May I know your connection limit? 
 customer: My maximum connection has to be 1. 
 agent: Sorry to notify to you that, there are no flights available with your needs. 
 customer: That's ok, thank you for giving the information. 
 agent: For documentation, may I know your name please? 
 customer: Yes, my name is Dennis Phillips.

Ex Output:
no_flight


Ex Input:
customer: Hello. I am Jacob Green. 
 agent: Hello, how can I help you today? 
 customer: I want to change my reservation, can you please help me? 
 agent: Sure, please wait for a moment. 
 customer: Sure. 
 agent: Sorry to say that, no reservation was found with your good name. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation