You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to some health issue, I want to cancel my recent reservation.

ASSISTANT: Sure, I am gleeful to help you with that.

USER: Thank you.

ASSISTANT:  May I know your name please?

USER: I am Samuel Smith.

ASSISTANT: Please wait for a moment, let me check your previous reservation status.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on our name in our reservation list to cancel it.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.