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

Input: Consider Input: customer: Hello.
agent: Hello.
customer: I am jonathan Miller.
agent: How can I assist you?
customer: My trip has been cancelled? Could you cancel my reservation?
agent: Yes, sure. Give me a moment.
customer: Ok.
agent: Jonathan Miller there is no reservation as per your name.
customer: It's ok. Thank you for your service.
agent: Thank you for choosing us.

Output: no_reservation

Input: Consider Input: customer: Hi.
agent: Hello, how may I abet you?
customer: Catherine Hall here, please cancel my reservation which I have done previously.
agent: Sure, may I know your good name? Thank you for providing your name, please hold on.
customer: Sure, I will wait for your response.
agent: No reservation found on your name.
customer: It's ok, thanks for your information.
agent: Thank you for choosing us, have a nice day.

Output: no_reservation

Input: Consider Input: customer: Hello, I planed a surprise meeting for my boy friend who stays in Atlanta. Would you please book a flight ticket from Washington, DC - IAD to Atlanta, GA - ATL for me?
agent: Hello, May I know your travelling dates?
customer: I would like to fly on 11/15 and recur on 11/17. And my name is Mary Taylor.
agent: Please wait a moment I will check and revert you.
customer: Sure.
agent: Yes, there is a flight found with your criteria.
customer: OK, thanks for your time.
agent: The details of flight is Air Line:UA, Flight number:1001 with price 100 and 1 connection. Shall I proceed with the booking?
customer: OK, I am happy with the flight details. Yes, you can proceed.
agent: Your flight is confirmed.
customer: Glad to hear you, thanks for your kind service.
agent: Thank you for contacting us.
Output: book