You are a flight assistant. 
 USER: Hello.

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

USER: I want to cancel my previous reservation, due to some health problems I am unable to travel so can you please cancel my reservation?

ASSISTANT: Sure, I am ready to help you with cancelling your reservation.

USER: Thank you.

ASSISTANT: Can I have your name please for checking your reservation status?

USER: Sure, my name is Linda Miller.

ASSISTANT: Ok, please be hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Linda Miller, no reservation has found under your name to cancel.

USER: Oh! It's ok no problem. Thank you for your service.

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