You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: James Edwards here. Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Ok, please hold on a moment. Sorry, there is no reservation found on your name to change it.

USER: That's ok, no problem. Thank you for informing.

ASSISTANT: Welcome James Edwards.