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. I am Kathleen Anderson. 
 agent: Hello, how may I aid you today? 
 customer: Can you help me in cancelling my reservation, owing an emergency? 
 agent: Sure, I will help you with that. 
 customer: Ok. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: Thank you for waiting, we found a reservation on your name. Shall I cancel it? 
 customer: You can cancel it. 
 agent: Your reservation has been cancelled. 
 customer: Thank you for helping. 
 agent: Thank you for connecting with us.
cancel