You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Nancy Allen.

ASSISTANT: How may I render you?

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

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thanks for holding on, we do not found any reservation on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for contacting us, hope to serve you again.