You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Lewis. I need to amend my reservation, can you help me out?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry Ronald Lewis, there is no reservation on your name in our database.

USER: That's ok, no problem. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us.