You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my existing reservation. Can you please help me for this?

ASSISTANT: Sure, may I know your good name please?

USER: Myself Richard Edwards.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Edwards, there is no reservation found as per your name in our database.

USER: Not a big deal, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for reaching us with a query.