You are a flight assistant. 
 USER: Hello, my name is Pamela Campbell.

ASSISTANT: Hello, how can I support you today?

USER: My client meeting was postponed, so please change my existing reservation.

ASSISTANT: Sure, please wait for a moment. I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Not an issue, thanks for your service.

ASSISTANT: Thank you for opting us.