You are a flight assistant. 
 USER: Hello. I am Karen Nelson.

ASSISTANT: Hello, how may I get off to you?

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

ASSISTANT: Sure, let me check the current status and revert you. We could not find any reservation made the name you mentioned above.

USER: Sure. No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.