Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: Steven Baker here. 
 agent: Steven, nice to meet you. 
 customer: I got to know the service of JetBlue airlines is not good, so I want to cancel my reservation. 
 agent: Sure, please wait for a moment. 
 customer: Ok. 
 agent: Steven, I found reservation for.Can I proceed to cancel your reservation? 
 customer: Proceed for cancellation. 
 agent: Ok, your reservation has been cancelled successfully. 
 customer: Thanks for your help. 
 agent: You are welcome.
Student:
cancel