cream of chicken soup recipe

**Ingredients:** - 2 tablespoons unsalted butter - 1 small onion, finely chopped - 2 cloves garlic, minced - 1 carrot, finely chopped - 1 celery stalk, finely chopped - 1/4 cup all-purpose flour - 4 cups chicken broth - 2 cups cooked chicken, shredded - 1 cup heavy cream or milk - 1 teaspoon dried thyme - 1/2 teaspoon dried parsley - Salt and pepper to taste - Fresh parsley, chopped (for garnish)