You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Stephen Hill. I just want to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, give me a moment.

USER: OK.

ASSISTANT: let me check your details regarding with that.

USER: Sure.

ASSISTANT: I am sorry Stephen Hill. I cant find any reservation regarding to your details.

USER: That's fine. Thank you for checking the details.

ASSISTANT: Thank you for your patience.

USER: Have a great day.

ASSISTANT: Your welcome.