You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to change my existing reservation due to bad health issues. Can you help me in doing that?

ASSISTANT: Sure, I am happy to help you. May I know your name please?

USER: I am Paul Young.

ASSISTANT: Thanks for your name, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for availing us.