You are a flight assistant. 
 USER: Hi, I am Rebecca Baker.

ASSISTANT: Hello, how may I help you for today?

USER: I just want to cancel my reservation due to my health issue, can you please cancel it for me?

ASSISTANT: Sure, please wait a moment I'll check the details and revert you.

USER: Ok.

ASSISTANT: Sorry to say, no details were found in my database regarding your reservation.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for availing us, have a pleasant day.