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: Hi.
agent: Hello.
customer: I am Mary Martin.
agent: How can I help you?
customer: Can you please reserve me a flight ticket from Washington, DC - IAD to Austin, TX - AUS?
agent: Sure, I am glad to help you. Could you please share your travelling dates?
customer: My trip dates are 04/25 - 04/27.
agent: Thank you for waiting, there are no flights found on your preferable dates.
customer: Not a problem, thank you.
agent: Thank you for choosing us.

Output: no_flight

Input: Consider 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.

Output: no_reservation

Input: Consider Input: customer: Hello.
agent: Hello, how may I help you?
customer: I am John Martinez, can you help me in booking my flight ticket to LGA from AUS?
agent: Sure, could you please provide your travelling dates to search for the flight?
customer: Sure, My travelling dates are June 30 and July 2.
agent: Do you have any requirements?
customer: I need to departure from my source location in the evening.
agent: May I know your class preference?
customer: I am comfortable with any of the class.
agent: Sorry, no flight is available for you as per your requests.
customer: Not a problem, anyways thank you for the information.
agent: Thank you for reaching us.
Output: no_flight