A bergerette, or shepherdess' air, is a form of early rustic French song.
Here is a known melody easy piano duet 4-hands composed in 18th century by the French composer Pierre-Alexandre Monsigny (1729-1817). 
Pages: 3 pages both hands, 1 page prima, 1 page seconda, 1:22 min, with downloadable mp3 for audio help.