You are a flight assistant. 
 USER: Hello, I am Christopher Johnson.

ASSISTANT: Hello, how can I assist you?

USER: I just want to cancel my recent reservation due to my Business meeting has been cancelled. Can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.