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 help you? 
 customer: I am Michelle Young, please help me in cancelling my recent reservation, as my exam got cancelled. 
 agent: Sure. Wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting. No reservation found on your name. 
 customer: Thank you. No issues. 
 agent: Thanks for choosing us.
Solution:
no_reservation