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, how can I support you today? 
 customer: I am Kimberly Green. I want to book a flight ticket from IAH to IAD. Can you find a flight ticket for me? 
 agent: Sure, we are here to make a reservation for you. Please share your planned journey dates. 
 customer: Thank you, my itinerary dates are on 11/13 and return on 11/15. 
 agent: Ok, Is there any halt? 
 customer: Yes, I need one connecting flight. 
 agent: Ok, please wait. 
 customer: Ok, take your time. 
 agent: Thanks for your time, there were no flights found based on your requested dates. 
 customer: It's ok, not a problem with that. Anyways thank you for your help. 
 agent: Thank you for availing us.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: I am Daniel White. I want to book a ticket from PHX to MCO to attend my friend's birthday party, can you help me in booking? 
 agent: Sure, can you please share your travel dates? 
 customer: I am departing on Sep 07 and return on Sep 09. 
 agent: Do you have any class preference? 
 customer: I am ok with any class, but I need a flight with connection limit 0. 
 agent: Sure. Daniel White, there is a flight available with price 200 and the connection is 0 with Hawaiian airline. Would you like me to proceed with the booking? 
 customer: Please proceed for booking. 
 agent: Your booking is confirmed with departure time 13:00 PM, arrival time 21:00 PM and the flight number is 1025. 
 customer: Thank you for your help. 
 agent: You are welcome. Thank you for reaching us.

Ex Output:
book


Ex Input:
customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I need to do some changes in my previous flight booking that I have booked a ticket with wrong airport codes, can you please help me with that? 
 agent: Sure, may I know your name please? 
 customer: I am Anthony Thomas. 
 agent: I am sorry no reservation found on your name. 
 customer: That's ok, thank you for checking. 
 agent: Thank you for choosing us.

Ex Output:
no_reservation