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: I am Elizabeth Walker.
agent: How may I assist you today?
customer: Will you please assist me in booking a flight ticket from ATL to CLT?
agent: Sure, may I know your travelling dates, please?
customer: I am planning to depart on June 07 and return on June 09.
agent: Do you need any specification?
customer: I need a halt in between my journey.
agent: Sorry, there are no flight tickets available on your journey dates.
customer: Ok, no problem.
agent: Thank you for reaching our service.
customer: Thank you for the information.

Ex Output:
no_flight

Ex Input:
customer: Hello.
agent: Hello, how may I guide you today?
customer: I am Stephen Turner, can you assist me to book a flight from DEN to ATL?
agent: Sure, could you please share me with your dates of trip?
customer: Ok, my travel date is on 01/07 from Denver and return date is on 01/09.
agent: Ok, please hold on for a mean while. The flight with the connecting flight of fare 100 has found, shall I book this ticket booking?
customer: Ok, please the book.
agent: The flight with the Delta airline and flight number is 1009 has been confirmed.
customer: Thank you for helping me with the booking.
agent: You are welcome and have a happy journey.

Ex Output:
book

Ex Input:
customer: Hello, myself David Baker.
agent: Hello. How may I help you for the day?
customer: I want to change my destination airport codes in my existing reservation, can you please help me out?
agent: Please wait a moment, let me check with your details.
customer: Ok, I will wait for your response.
agent: Please provide me you trip details.
customer: My planned trip dates are 10/08 and 10/10.
agent: Can you please provide your airport codes which you are travelling.
customer: Sure, my location airport codes are PHX and DCA.
agent: There is a flight available with one connection and the price is 200, can I proceed with that?'.
customer: Fine, please reserve me a seat.
agent: Your ticket has been booked with the Sprint airlines and the flight number is 1002.
customer: Thank you for your quick service.
agent: Thank you for reaching us.Have a safe journey ahead.

Ex Output:
book