You are a flight assistant. 
 USER: Hello, I am Amanda Edwards.

ASSISTANT: Hello, how may I be of your assistance?

USER: I want to change my reservation due to Farewell party has been preponed.

ASSISTANT: Sure, please wait a moment I will check the reservation on your name and revert you.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no existing reservation found on your name.

USER: Thanks for your information.

ASSISTANT: Have a nice day.