Given the task definition and input, reply with output. 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: Hi. 
 agent: Hello, how may I serve you today? 
 customer: I want to cancel my reservation as I am not feeling good to make a trip. Can you help me with that? 
 agent: Sure, may I know your name? 
 customer: Ok, my name is Joseph Rodriguez. 
 agent: Ok, please wait for a minute. 
 customer: Sure, take your time. 
 agent: We found a reservation on your name, shall I cancel it? 
 customer: Yes, cancel it. 
 agent: Your reservation has been cancelled. 
 customer: Thank you for cancelling my reservation. 
 agent: Thank you for choosing us.
cancel