You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Today, I would like to make few changes in my existing reservation which I have made last week, can you help me?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: Sure, myself Laura Jackson.

ASSISTANT: Ok, please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available on your name Laura Jackson.

USER: That's fine, no issues with it. Anyways, thank you for checking.

ASSISTANT: Do you want to know any thing else from us?

USER: No, thanks.

ASSISTANT: Thank you for reaching us, have a nice day Laura Jackson.

USER: Most welcome.