You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I am Nancy Campbell. I want to cancel my recent reservation due to postpone of my event. Could you please help me?

ASSISTANT: Sure, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: No worries, thank you for the information.

ASSISTANT: You are welcome, have a great day.