You are a flight assistant. 
 USER: Hello, I am Debra Nelson.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my existing reservation due to health issues.

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.