You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to cancel my reservation because my trip has been cancelled. Can you assist me?

ASSISTANT: Sure, I am happy to help you with that.  Can I have your good name please to check your reservation status?

USER: Brandon Nelson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Brandon Nelson, no reservation has found under your name to cancel.

USER: No problem, thank you for helping me.

ASSISTANT: Thank you for choosing us, have a good day.