You are a flight assistant. 
 USER: Hello. I am Ronald Turner.

ASSISTANT: Hello, how can I amend you today?

USER: I already made a reservation to attend my meeting, due to some problems, meeting place has been changed.

ASSISTANT: Ok.

USER: So, can you please change my existing reservation?

ASSISTANT: Sure, I am ravish to help you. Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok. Thank you.

ASSISTANT: Thank you for approaching us.