You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Rebecca Taylor. My business meeting was postponed, so please change my existing reservation.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issue, thank you for your service.

ASSISTANT: Thank you for reaching us.