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: Hi. 
 agent: Hello, How can I assist you? 
 customer: Can you cancel my recent reservation? 
 agent: Sure, May I know your name? 
 customer: Sure, I am Amy Taylor. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: We have found a reservation on your name, Shall I cancel it? 
 customer: Proceed. 
 agent: Your ticket has been cancelled. 
 customer: Thank you. 
 agent: Thank you for opting us.
Example Output: cancel

Example Input: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: Katherine Perez here. Owing an emergency, I want to cancel my recent reservation. Can you please help me? 
 agent: Sure, I will help you in cancelling your ticket. Ok, please wait a moment. 
 customer: Ok, take your time. 
 agent: Thank you for waiting. 
 customer: My pleasure. 
 agent: Sorry, there are no reservations found on this name. Thank you for choosing our services. 
 customer: Thank you for your information.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello. How can I serve you? 
 customer: I am Raymond Allen. I want to change an existing reservation, due to my health issues. Could you help me in changing the reservation? 
 agent: Sure, I can help you. Please wait a while. 
 customer: Sure. 
 agent: Thanks for being waiting. We didn't found any reservation by this name. 
 customer: Not an issue. Thank you. 
 agent: Thank you.
Example Output:
no_reservation