You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Paul Brown here.

ASSISTANT: How can I assist you now?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure Paul Green, I will help you with that. Please be hold on for a moment to check your reservation status.

USER: Sure.

ASSISTANT: Sorry Paul Green, no reservation has found under  your name to cancel.

USER: Not a problem. Thank you.

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