You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Will you help me in changing my recent reservation?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name to check your reservation status?

USER: Cynthia Thompson here.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, we have not found any active reservation on your name in our database.

USER: That's ok, thank you for checking.

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