Cook orzo according to package directions, omitting salt and fat.
Drain. Stir in parsley, 2 teaspoons butter, 1/4 teaspoon salt, and 1/8 teaspoon pepper. Keep warm.
While pasta cooks, sprinkle chicken with the remaining 1/4 teaspoon salt and the remaining 1/8 teaspoon pepper; sprinkle fines herbes over both sides of chicken, pressing gently to adhere.
Melt remaining 4 teaspoons butter in a large nonstick skillet over medium heat.
Add oil to pan, and swirl to coat.
Add chicken to pan; cook 5 minutes or until browned. Turn chicken over; cook 7 minutes or until done.