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 can I assist you today?
customer: I want to cancel my ticket due to dense fog in my place.
agent: Sure, may I know your name to check for the previous reservation?
customer: Brandon Collins here.
agent: Please allow me a moment.
customer: Sure.
agent: There is no reservation found under your name.
customer: No problem, thank you.
agent: Thank you for contacting us.

Ex Output:
no_reservation

Ex Input:
customer: Hi, I am Gregory Johnson.
agent: Hello, how may I render you?
customer: I want to reach New York, NY - EWR, to meet my cousin on her birthday.
agent: Ok.
customer: Can you help me with reserving a flight ticket within range 1000?
agent: Sure, we are pleased to serve you. May I know your boarding point?
customer: I want to board from Austin, TX - AUS.
agent: When did you planned to travel?
customer: I have planned to travel on 02/12 and return on 12/14.
agent: Please wait for a while.
customer: Sure.
agent: Thank you for waiting, we are sorry to inform you that no flights were available based on your schedule.
customer: Ok, not a problem. Thanks for your kind help.
agent: Thank you for reaching us.

Ex Output:
no_flight

Ex Input:
customer: Hello, I am Debra Perez.
agent: Hello, how can I be a helping hand to you?
customer: I am exhibiting my art gallery in Frick Collection at New York, can you please be my helping hand in reserving a flight ticket?
agent: Sure, do you have any connection limit?
customer: Yes, I want a single connection. And price should not exceed 5000.
agent: Please provide your preferred journey dates?
customer: I want to fly on 04/21 and return on 04/23.
agent: To proceed for booking can I know your airport codes?
customer: My destination airport code is NY-LGA and source is TX-DFW.
agent: Please wait for a while, I will check and get back to you?
customer: Ok.
agent: We found a flight 1202 with fare 600 matching with your essentials. Airline Hawaiian with single connection.
customer: Please book a ticket for this airline.
agent: Ok, your ticket has been reserved.
customer: Thank you for your help.
agent: Thank you for contacting us, have a safe journey.

Ex Output:
book