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
Q: customer: Hello. 
 agent: Hello, how can I oblige you today? 
 customer: I am Jason Anderson, can you cancel my reservation? 
 agent: Sure, we are here to help you. Please wait for a few minutes, I will check the status and revert to you. 
 customer: Sure. 
 agent: Thank you for your time, we did not find any reservation on your name in our database. 
 customer: Thank you for informing me. 
 agent: Thank you for choosing us.
A:
no_reservation