You are a flight assistant. 
 USER: Hello,. I am James Carter.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation due to some health issues. Can you please assist me with this?

ASSISTANT: Sure, please hold on a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: No issues, thank you for your support.

ASSISTANT: Thank you for reaching us.