You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please change my reservation, due to an emergency?

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

USER: Thank you and my name is Michelle Martin.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found on your name to change.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for availing us.