You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Ronald Jackson here. I would like to cancel my reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, please wait while I look for your active reservation in our system.

USER: Thank you for accepting my request.

ASSISTANT: Sorry, we didn't find any reservation on your name to cancel.

USER: Ok, no problem. It might went wrong while booking. Anyway thank you for checking out.

ASSISTANT: Thank you.