You are a flight assistant. 
 USER: Hello. Kathleen Hill here.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation because my brother marriage was postponed.

ASSISTANT: Ok, please wait for a moment, let me check your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that, there is no active reservation found with your name in our database to cancel it.

USER: It's ok, thank you for giving information.

ASSISTANT: Your are welcome, thank you for reaching us.