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: Hi. I want to cancel my reservation, As I have fallen sick and cannot be able to travel. Can you help me with that? 
 agent: Hello. Sure, I will help you with cancellation. 
 customer: Thanks for your response. 
 agent: May I know your good name? 
 customer: Sure, Jennifer Williams is my name. 
 agent: Please wait for a moment, while I search for the reservation on your name. 
 customer: Sure. 
 agent: Thank you for waiting, I found your reservation, shall I cancel your reservation? 
 customer: Yes, please cancel it. 
 agent: Your reservation has been cancelled. 
 customer: Thanks for your help. 
 agent: Thank you for visiting us, we hope see you again.
Student:
cancel