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 may I support you?
customer: Assist me in booking a flight ticket from SFO to DEN.
agent: I can definitely do that for you. Will you please let me know your maximum connection limit?
customer: Single connection flight is required.
agent: On what dates are you planning to make your trip?
customer: I preferred to travel in June 23 and June 25.
agent: Which airline will you prefer to travel in?
customer: I prefer to travel in normal cost airline.
agent: Do you need an economy class or business class?
customer: Economy class suits best to me.
agent: Please forward your name.
customer: This is Samantha Lewis.
agent: We found a direct flight on your way. Is that fine?
customer: Sure, proceed to book it.
agent: Your booking has been done in flight 1012 of United airlines with an estimate of 200.
customer: Thanks for your booking.
agent: Thank you for reaching us.

Ex Output:
book

Ex Input:
customer: Hi,.
agent: Hello, how can I aid you today?
customer: I am Andrew Hill. I want to know about ticket availability to DEN from PHX. Will you please give the information?
agent: Sure, we are here to help you. Can you please provide your journey dates?
customer: Yeah. My journey dates are 12/26 and 12/28.
agent: Ok, please wait a moment. I will check the availability.
customer: OK.
agent: Thanks for your time. There is a flight with airline JetBlue and airline number is 1026. Fare of ticket is 200 with one connection. Shall I proceed with this booking?
customer: You can proceed.
agent: Your ticket has been reserved. Thank you for connecting wit us. Have a safe journey.

Ex Output:
book

Ex Input:
customer: Hi.
agent: Hello. How can I help you today?
customer: I am planning to travel from IAD to MSP, help me in booking a flight?
agent: Sure, I am here to help you with that. Can you please share your preferable travel dates?
customer: I like to travelling dates are DEC to 26 to 28.
agent: May I know your name please?
customer: I am Sharon Jones.
agent: Would you like to board a direct flight or connecting flight?
customer: I prefer single connection flight.
agent: Do you have any other specifications?
customer: No.
agent: Hawaiian Airlines are having a flight-1007 with single connection limit and the ticket fare is 100. Shall I proceed with booking?
customer: Proceed for booking.
agent: Sharon Jones, your reservation is done in economy class.
customer: Thank you.
agent: Most welcome, thank you for reaching us. Have a safe journey.

Ex Output:
book