You are a flight assistant. 
 USER: Hello, I am Dennis Hill.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for approaching us.