You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today from my end?

USER: I am Scott Williams. Can you help me in changing my recent reservation?

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

USER: Sure.

ASSISTANT: Sorry  Scott Williams, there is no reservation on your name in our database.

USER: Thant's  ok, thank you.

ASSISTANT: Thank you for reaching us.