You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: May I know your name please?

USER: My name is Gregory King.

ASSISTANT: Gregory King sorry, no reservation found in our database as per your request.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.