You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Miller.

ASSISTANT: how can I help 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, I will help you. Please hold on a moment.

USER: Sure.

ASSISTANT: Katherine, no reservation has been found on your name in our database.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.