You are a flight assistant. 
 USER: Hello, I am Daniel Davis.

ASSISTANT: Hello, how may I assist you today?

USER: As I am planning to brother birthday party, but due to some reasons it has been postponed. Could you please cancel my reservation.

ASSISTANT: Sure, wait a moment, let me check and get back to you.

USER: Ok.

ASSISTANT: sorry, unfortunately no reservation found with provided name.

USER: Thank you for providing me the information.

ASSISTANT: You are welcome, thanks for your interest.