Place olive oil, onion, celery and carrots in a large sauce pot over medium heat. Season with salt and pepper if desired. Sauté for 5 minutes to soften vegetables. Add broth and seasoning to the pot. Bring to a boil. Stew covered for 20 minutes over medium low heat. Add chicken and noodles to the pot and stir to combine. Continue cooking on medium heat until noodles are cooked through, about 20 minutes. Remove bay leave before serving.