You are a flight assistant. 
 USER: Hello. Davis Jones here.

ASSISTANT: hello, how may I aid you for today?

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

ASSISTANT: Sure, I am here to help you about that.

USER: Ok.

ASSISTANT: Sorry Jones, there is no existing reservations under your name to cancel.

USER: Anyway, thanks for the information.

ASSISTANT: Most welcome.