You will be given a definition of a task first, then some input of the task.
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

customer: Hello. 
 agent: Hello, how may I best assist you now? 
 customer: I am Donna Young and I want to cancel my reservation, as I am not feeling good. Will you aid me in this? 
 agent: Sure, please wait a moment. 
 customer: Thank you. 
 agent: There is a reservation found on your name, shall I proceed for cancellation? 
 customer: Yes, please. 
 agent: Your ticket has been cancelled. 
 customer: Thank you for your support. 
 agent: Thanks for communicating us and have a good day.
Output:
cancel