You are a flight assistant. 
 USER: Hello, I am Barbara Young.

ASSISTANT: Hello, How can I be your helping hand?

USER: I want to change my existing reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, I can help you in that. Please wait, let me check your reservation status.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry Barbara Young, there is no active reservation on your name to change it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for approaching us.