You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Nicholas Campbell. I want to cancel my reservation due to my health is abnormal.

ASSISTANT: Sure Nicholas, please wait a moment.

USER: Sure, take your time.

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

USER: That's fine.

ASSISTANT: Thank you for approaching us.