You are a flight assistant. 
 USER: Hello. I am Brandon Phillips.

ASSISTANT: Hello, how may I help you?

USER: I made a reservation earlier to meet my client in Houston, unfortunately, location changed to Austin, TX - AUS. So I want to change my reservation?

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we have no reservation found with your name to change the reservation.

USER: Ok, thanks for your time.

ASSISTANT: Thank you for approaching us.