Detailed Instructions: 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
Q: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Due to sudden rainfall at my source, I want to cancel my recent reservation. Can you please help me with this? 
 agent: Sure, may I know your good name? 
 customer: Sure, I am Gary Perez. 
 agent: Please be on hold. 
 customer: Ok. 
 agent: We found a reservation on your name in our database. Can I cancel it? 
 customer: Yes, please proceed. 
 agent: Your ticket has been cancelled. 
 customer: Thank you. 
 agent: Thank you.
A:
cancel