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: Hi. 
 agent: Hello. How may I assist you? 
 customer: I want to cancel my reservation, can you help me with that? 
 agent: Sure, I am here to help you with your concern. 
 customer: Thank you for accepting my bid request. 
 agent: May I know your name please to check your reservation status? 
 customer: Sure, Robert Carter here. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Robert Carter, no reservation has been found on your name in our database. 
 customer: Ok, thank you. 
 agent: Thank you for choosing us.
Solution:
no_reservation