You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Robert Jackson. I want to cancel my reservation because my health is not good.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure, take your own time.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's fine.

ASSISTANT: Thank you for reaching us, have a nice day.