Notification with assignment


I have a sheet set up to notify the person in an assigned column when that row changes. My intention is that if I make a change and assign it to my staff person, they get notified. However, if I make the change on a row that is assigned to me, I still get notified myself. How do I make a condition so that it checks for the person making the change? If I make the change and the row is assigned to me, I obviously don't need to be notified...