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 can I help you today? 
 customer: I am Jack Moore. I want to cancel my reservation, due to my health issues. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: I found reservation with your name, shall I proceed to cancellation? 
 customer: Yes, you can proceed to cancellation. 
 agent: Your reservation has been cancelled successfully. 
 customer: Thanks for your good service. 
 agent: Thanks for choosing us.
Output:
cancel