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, I am Jerry Robinson.
agent: Hello Jerry. How can I assist you?
customer: I would like to cancel my recent reservation due to postpone of my conference at Denver. Could you please help me with the cancellation?
agent: Sure, please give me a minute.
customer: Sur.
agent: Jerry, there is no reservation available on your name.
customer: That's fine, thank you for the information.
agent: You are welcome.
Example Output: no_reservation

Example Input: customer: Hello, I am Thomas Young.
agent: Hello Thomas Young. How can I help you today?
customer: I have planned a trip with my friends, can you help in the process of booking ticket.
agent: Sure, can you provide me your travellings details?
customer: My travelling is from San Francisco, CA - SFO to Detroit, MI - DTW. My travelling dates are on 04/24 to 04/26.
agent: Sure, wait for a moment, I will revert you.
customer: I need a single connection with price of 5000. Sure,.
agent: Thanks for waiting. We could not find any flights for your specification.
customer: OK, thank you for the information. Thank you.
agent: Thank you for reaching us.
Example Output: no_flight

Example Input: customer: Hello.
agent: Hello, how may I support you?
customer: I am Jeffrey Davis, I want to book a flight ticket to attend my sister's baby shower ceremony. Can you help me with that?
agent: Sure, can you please share your airport codes?
customer: I would like to travel from HOU to SEA.
agent: Kindly share your price limit?
customer: Price limit should not exceed 1000.
agent: Please provide your journey dates?
customer: I want to fly from 05/01 and return on 05/03.
agent: Please wait a while.
customer: Ok.
agent: Thank you for waiting. We found a flight with AA airlines and flight number is 1011 having single connection.
customer: It is perfect for me, please proceed with the booking.
agent: Your reservation has been done.
customer: Thanks for helping me.
agent: Thank you for choosing us.
Example Output:
book