You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. how can I help you?

USER: I am Dennis Smith. I want to cancel my recent reservation, due to some health issues. Can you please help me out?

ASSISTANT: Sure, I will help you with that cancellation.

USER: Thank you.

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

USER: Ok, take your own time.

ASSISTANT: I am very sorry to say, There is no reservation found with your name in our database.

USER: That's ok, thank you for you quick response.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Your are most welcome.