You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Sure, we are here to help you. To proceed further, May I know your name?

USER: Sure, my name is Kimberly Walker.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you for approaching us.