You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for the day?

USER: I need to cancel my reservation as I am suffering from ill health. Can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know on which name the ticket was reserved?

USER: Sure, my name is Debra Lee on which I have done my reservation.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we could not find any reservation against your name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for opting us. Have a good day.