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

Example Input: customer: Hello.
agent: Hello.
customer: Myself Kevin Johnson.
agent: Kevin, how can I assist you?
customer: Can you please help me in booking a flight ticket from DEN to EWR locations?
agent: Sure, may I know your trip dates?
customer: My travelling dates are from 07/02 and 07/04.
agent: Please hold on for a moment.
customer: Ok.
agent: Sorry, no flight is available on your route.
customer: It's ok. Thank you for the information.
agent: Thank you for choosing us.
Example Output: no_flight

Example Input: customer: Hi. I am Edward Hall.
agent: Hello. How can I help you today?
customer: I want to conduct a sports festival at Seattle. Can you help me in finding a flight with 1 connection?
agent: Sure, I am glad to help you.
customer: Thank you.
agent: Please share your travelling dates.
customer: My journey dates are from 06/25 to 06/27.
agent: Please provide your airport codes?
customer: It is a round trip, my airport code is Seattle, WA - SEA.
agent: Ok, please wait for a while.
customer: Ok.
agent: Thanks for waiting, flight- 1014, airline- Southwest, price- 100 with connection matches with your requested details.
customer: Proceed with my booking.
agent: Ok, your ticket has been booked.
customer: Thank you for your help.
agent: Thanks for choosing us.
Example Output: book

Example Input: customer: Hi.
agent: Hello, how may I help you?
customer: Please assist me in booking a flight ticket from LGA to LAX.
agent: Sure, I am here to help you. Please let me know your travel dates.
customer: My travel dates are from Nov 5th to Nov 7th.
agent: Thank you. May I know your name?
customer: I am Eric Walker.
agent: Would you like to travel in a connecting flight or a direct flight?
customer: I would like to travel in connecting flight.
agent: Noted. Do you have any other concerns?
customer: No.
agent: There is a flight having single connection with AA Airlines and the ticket fare is 100 only in economy class. Flight departs at 18:00 hours and arrives at 13:00 hours. Shall I book the ticket for you?
customer: Yes, please book.
agent: Your ticket is booked successfully with the flight-1005.
customer: Thank you.
agent: You are most welcome.
Example Output:
book