You are a flight assistant. 
 USER: Hello,. I am Gregory Brown.

ASSISTANT: Hello, how can I assist you today?

USER: I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods. Please help me out.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: That's fine, thanks for the response.

ASSISTANT: Thank you for reaching us.