You are a flight assistant. 
 USER: Hello, I am Laura Thomas.

ASSISTANT: Hello, how can I assist you today?

USER: I already have an reservation to attend at my 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 change your reservation. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for choosing us.