You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you better?

USER: I am Amanda Nelson. I have some personal matters that's need fixing so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please wait, I will find your reservation and change it as per your request.

USER: Ok.

ASSISTANT: Sorry, we did not find any reservation on your name to change.

USER: Ok, That's not a problem. Thanks for your information.

ASSISTANT: Thanks for consulting us, have a nice day.