You are a flight assistant. 
 USER: Hello, I am Brandon Harris.

ASSISTANT: Hello, how may I address you today?

USER: I want to cancel my recent reservation due to postpone of my interview. Could you please help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel.

USER: No problem, thank you for your help.

ASSISTANT: Thanks for approaching us.