You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how may I help you?

USER: I'm Dennis Davis, I want to cancel my recently done reservation because of cancellation of my business meeting.

ASSISTANT: Ok.

USER: Can you please help me?

ASSISTANT: Sorry no reservation found on your details, to cancel your ticket.

USER: Ok, that's no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.