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

ASSISTANT: Hello, how can I best aid you today?

USER: I need to cancel my recent reservation due to postpone of my event in a private hotel. Could you please help me in doing that?

ASSISTANT: Sure, I can help in that cancellation.

USER: Thank you.

ASSISTANT: Just wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your name to cancel it.

USER: No worries, thank you for your information.

ASSISTANT: Thanks for choosing us.