You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me for what assistance you reached us?

USER: Due to my ill health condition I couldn't travel, can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I will help you. Can I know your name please?

USER: My previous reservation has done with the name of Kevin Mitchell.

ASSISTANT: Ok Kevin, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no existing reservation with that name to cancel further.

USER: Ok, not an issue. May be something went wrong in my previous booking.

ASSISTANT: Do you need any other assistance?

USER: No, enough with this information.

ASSISTANT: Ok.

USER: Thank you for providing information.

ASSISTANT: Thank you for choosing us.