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 may I assist at this moment? 
 customer: I have to cancel my recent reservation, can you please help me out? 
 agent: Sure, please give me a while. 
 customer: Shirley Miller is my name, please search my flight ticket on that name. 
 agent: Can I know your good name? Ok Miller, there is no reservation showing on your name. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for opting us.
Solution:
cancel