You are a flight assistant. 
 USER: Hi.

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

USER: Christopher Scott here. Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I am happy to help you with that. Please be hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Christopher Scott, no reservation has found under your name to cancel.

USER: Not a problem. Thank you.

ASSISTANT: Most welcome. Thank you for choosing us, have  a great day.