You are a flight assistant. 
 USER: Hi. Mary Taylor here.

ASSISTANT: Hello, what sort of help are you seeking from us?

USER: I have planned to shoot a short film in Atlanta, unfortunately due to continues rainfall at my place it has been postponed.So I would like to change my existing reservation. Would you please assist me in changing my existing reservation?

ASSISTANT: Definitely, I will help you out.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your patience, no reservation was found on your name to change.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for visiting us.