The Hat Rule

you were a barmaid. You served drinks, food, cleaned, and cooked. Your father was the bar owner so working there was expected. You saw all sorts of people after all it was a small town in the south you knew almost everyone however people often passed through. Today you were getting a tray of drinks when a cowboy came in. He walked up to the bar and as you went to greet him he smiled and put his cowboy hat on your head

what do you do?