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 may I help you today? 
 customer: I need to cancel my reservation due to cancellation of my visa process. Can you help me with it? 
 agent: Sure, may I know your good name please? 
 customer: Gregory Hill is my name. 
 agent: Ok, please wait for a while, I will check and get back to you. 
 customer: Sure, I will wait. 
 agent: Sorry, there was no reservation found with your name. 
 customer: Ok, no issues. Thanks for your service. 
 agent: Thank you for opting us.
A:
no_reservation