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: Jeffrey Campbell here. 
 agent: Campbell, how can I assist you? 
 customer: My interview got postponed, so I want to reschedule my itinerary dates. 
 agent: Sure, I will help you with that. Let me check your reservation status. 
 customer: Sure. 
 agent: Campbell, I did not find any reservation by your name in our database. 
 customer: It's ok, thank you. 
 agent: You are welcome and thank you for choosing us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello, how may I serve you today? 
 customer: I would like to travel from BOS to JFK as a business trip, can you do the reservation? 
 agent: Sure, may I know your good name please? 
 customer: Daniel Hall here. 
 agent: When you are willing to travel? 
 customer: My trip dates are Jan 16th and Jan 18th. 
 agent: Is there any connection limit for you? 
 customer: I need break in my journey. 
 agent: Please share your other specifications if you have. 
 customer: No. 
 agent: Thank you for waiting and we have found a flight in an economy class with 1 connection in Hawaiian airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: Please carry on. 
 agent: Your ticket has been reserved with flight number 1004. 
 customer: Thank you so much. 
 agent: Thank you for approaching us.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I'm Jacob Walker. I want to change my existing reservation. Will you do it for me? 
 agent: Sorry to say that Jacob, unfortunately there is no reservation found under your name. Thanks for reaching us. Have a great day. 
 customer: OK, No issues. Thank you for information.

Ex Output:
no_reservation