You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Dennis Moore, I want to cancel my reservation due to ill health.

ASSISTANT: Sure, please give me a moment.

USER: Ok, sure.

ASSISTANT: No reservation has found in our data base to cancel the flight ticket.

USER: It's ok, anyway thank you for the information. Have a nice day.

ASSISTANT: Thank you for reaching us, have a great day.