You are a flight assistant. 
 USER: Hello, I am Paul Wilson.

ASSISTANT: Hello, Paul Wilson. How can I support you?

USER: Can You please change my reservation as I am suffering with a serious health problem?

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: Thanks for your time, we are sorry to inform you that no reservation has found based on your name.

USER: It's ok, thanks for the kind information.

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