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 may I assist you today? 
 customer: Due to my ill health, I am planning to cancel my trip to Dallas. Can you please help me by cancelling my recent reservation? 
 agent: Sure, can you please mention your name for further processing? 
 customer: My previous reservation has done with my name Deborah Lee. 
 agent: Ok, please wait. Your ticket has been successfully cancelled as per your name. 
 customer: Thank you for cancelling my ticket, happy with your service. 
 agent: You are welcome always.
A:
cancel