From Scratch Chicken Pot Pie

Name: From Scratch Chicken Pot Pie
Ingredients: 3-4 chicken breast; 1 cup heavy cream; 1/3 cup all-purpose flour; 1 cup carrots; 1 cup yellow or sweet onion; 1 cup celery or 1 no salt added can corn; 2 cups unsalted chicken stock; 2-4 tablespoons butter or margarine; to taste salt and pepper; 1 package pre made pie crust crust