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: Hi. 
 agent: Hello. How can I help you now? 
 customer: Owing to an emergency I want to cancel my reservation, can you help me? 
 agent: Sure, may I know your name please? 
 customer: Myself Emma Phillips. 
 agent: I found a reservation on your name, can I cancel it? 
 customer: You can cancel it. 
 agent: Your reservation is successfully cancelled. 
 customer: Thank you for your help. 
 agent: You are welcome.
A:
cancel