You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Please cancel my recent reservation due to some health issues?

ASSISTANT: Sure, I am  happy to help you with that. Can I have your  good name please?

USER: Sure, I am Sandra Jones.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Sandra Jones, no reservation has found  under your name to cancel.

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

ASSISTANT: Thank you for choosing us, have a good day.