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: Hi.
agent: Hello, how may I help yo today?
customer: Stephen Harris here. Please help me out in booking the ticket from MSP to EWR.
agent: Sure, can you please mention with your dates of journey?
customer: My trip dates will be Mar 27 to Mar 29.
agent: Ok, may I know your airline preference please?
customer: No.
agent: May I know your class preference please?
customer: Business class.
agent: Please wait for a mean while.
customer: Ok.
agent: Sorry Stephen, there is no flight found as per your travelling details.
customer: That's ok, thank you.
agent: You are welcome.

Ex Output:
no_flight

Ex Input:
customer: Hello.
agent: Hello. How can I help you?
customer: I am planning to visit Philadelphia, can you please book me a ticket from LAS to PHL?
agent: Sure, I will help you. Can you please share your travel dates?
customer: My preferable journey dates are from 03/17 to 03/19.
agent: Please wait a moment.
customer: Sure.
agent: Hawaiian airlines are providing service on your route with 1 connection and fare is 100. Can I proceed?
customer: Please book my ticket with the name Margaret King.
agent: Ok. Your booking is done with flight 1012.
customer: Thank you for booking my ticket.
agent: Thank you for choosing us.

Ex Output:
book

Ex Input:
customer: Hello.
agent: Hello, how may I serve you?
customer: Could you book my ticket in a connecting flight?
agent: Sure, help me with the trip dates?
customer: My trip dates are July 19 and July 21.
agent: May I know your airport codes that you wish to board and land?
customer: I want to travel from ATL to ORD.
agent: Do you have any class preferences?
customer: I prefer economy class.
agent: May I know your name please?
customer: Sandra Green here.
agent: We found a flight in an airline Delta with 1004 number having a single connection price of 200 in an economy class. Shall I reserve it?
customer: Please book my ticket.
agent: Your flight ticket has been booked.
customer: Thank you.
agent: Thank you for reaching us.

Ex Output:
book