You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please change my existing reservation due to some health issues?

ASSISTANT: Sure, I am here to help you. Please provide your good name.

USER: Sure, I am Nicole Wright.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

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

ASSISTANT: Thank you for availing us.