Sauté pancetta in large nonstick skillet over medium-high heat until crisp. Using slotted spoon, transfer to paper towels. Add onion to skillet; sauté 5 minutes. Add carrots, bell pepper and garlic; sauté vegetables until crisp-tender, about 5 minutes. Stir in chicken, tomatoes, broth and oregano; simmer until chicken is cooked through, about 4 minutes. Stir in parsley and pancetta. Season with salt and pepper. Toss pasta with chicken mixture.