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 guide you at this moment?
customer: I need to book a flight ticket from PHL to MCO, can you please help me for booking?
agent: Sure, may I know your travelling dates please?
customer: I would like to travel on 12/10 to return on 12/12.
agent: Ok, do you need any stopover in between the journey?
customer: I need a connecting flight.
agent: Do you prefer business or economy class?
customer: I need a business class.
agent: Can I have your good name please?
customer: Brenda Campbell here.
agent: There are no flights found on your requested dates.
customer: Ok, no problem.
agent: Thank you for reaching us.
customer: Thanks for your information.

Ex Output:
no_flight

Ex Input:
customer: Hi.
agent: Hello.
customer: My name is Eric Wilson.
agent: Eric, how can I help you?
customer: Due to heavy rains in my existing location, I want to cancel my reservation. Could you help me in cancellation of ticket?
agent: Sure, I will help you. Please wait for a while, I will check your reservation status and get back to you.
customer: Ok, take your time.
agent: Wilson, I did not find any reservation by your name in our database.
customer: That's fine, no problem. Thank you for helping me.
agent: You are welcome and thank you for choosing us.

Ex Output:
no_reservation

Ex Input:
customer: Hello, I am Joseph Turner.
agent: Hello, how may I assist you at this moment?
customer: I would like to book a ticket from IAH to ORD.
agent: Sure. Please send your nearby airport codes. Please share your travelling dates.
customer: Sure, I would like to go on 01/27 and return back on 01/29.
agent: Please wait for a moment.
customer: Ok, ensure it is a single connecting flight.
agent: There is a flight available with Spirit airline, shall I book it?>.
customer: Ok, please proceed for further.
agent: Your booking is done with flight number 1021. Happy journey.
customer: Thank you.
agent: Thank you for reaching us.
customer: Welcome.

Ex Output:
book