You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Michael Hill. I want to cancel my reservation, due to health issue.

ASSISTANT: Sure, please wait for a moment. I will search with your details and get back to you. Sorry Michael. I could not find any reservation on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for reaching to us.