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
Problem:customer: Hello,. 
 agent: Hello. How can I assist you today? 
 customer: I am Debra Campbell. Can you please cancel my reservation, due to cancel of my trip with colleagues? 
 agent: Sure, please allow me a moment to check for the previous reservation. 
 customer: Sure. 
 agent: Debra Campbell, I found your reservation and successfully cancelled your reservation. 
 customer: Ok, thank you for cancelling my ticket. 
 agent: You are welcome. Thank you for reaching us.
Solution:
cancel