You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Patrick Lopez. My business meeting got postponed, so I want to change an existing reservation.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thanks for opting us, have a good day.