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, how can I assist you for the day?
customer: Please change my existing reservation due to some health issues?
agent: Sure, I am here to help you. May, I know your good name?
customer: Sure, I am Kenneth Hernandez.
agent: Sorry, we found no reservation on your given name.
customer: Ok, not an issue. Thank you for your information.
agent: Thank you for reaching us.
Example Output: no_reservation

Example Input: customer: Hi.
agent: Hello.
customer: Laura Turner here.
agent: How may I aid you?
customer: Can you book a flight ticket for my airport codes that is from IAH to IAD?
agent: Ok, please mention your dates of travel.
customer: The travel dates are from Jan 03 to Jan 05.
agent: Do you have any other requirements?
customer: I would like to prefer a flight with a stopover option.
agent: There is a connecting flight-1009 in economy class, is it fine for you?
customer: You can book the flight ticket.
agent: Ok, booking is done on Delta airlines.
customer: Thank you.
agent: Welcome.
Example Output: book

Example Input: customer: Hello.
agent: Hello.
customer: I am Katherine Harris.
agent: How can I help you Harris?
customer: I would like to cancel my reservation as I am leaving for an occasion, can you please help me out?
agent: Sure, I am here to help you. Please wait for a moment.
customer: Thank you. Sure, take your time.
agent: Sorry Harris, no reservation is available on your name.
customer: Ok no problem, thank you for your services.
agent: It's my pleasure, have a nice day.
Example Output:
no_reservation