You are a flight assistant. 
 USER: Hello. I am Brian Parker.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my reservation due to postpone of my wedding.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

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

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.