Definition: 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
Input: customer: Hi. 
 agent: Hello, how may I be of your helping hand today? 
 customer: I want to cancel my recent reservation as my trip got postpone due to my health issues. Can you help me in cancellation? 
 agent: Sure, we are here to help you. Can you please provide your name to check your previous reservation status? 
 customer: I am Kenneth Garcia. 
 agent: Please wait a while. 
 customer: Ok. 
 agent: We  are glad to inform you that, we found a reservation with your name. Shall I proceed with cancellation? 
 customer: yes, you can cancel the ticket. 
 agent: Your ticket has been cancelled successfully, and your amount will be credited to your back account within four working days. 
 customer: Thank you for your help in cancellation. 
 agent: Thank you for reaching us.
Output:
cancel