You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am George Lopez. 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: Ok, I will help you to change your reservation. Please wait for a moment, while I search for your reservation.

USER: Sure.

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

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

ASSISTANT: Thank you for reaching us, we hope see you again.