Melt butter in a pan and add chopped garlic, onions, celery and thyme. Stir it on low flame for 2 mins. Now add chicken and cook for 3 mins. Sprinkle flour and sauté for a minute. Add water and bring it to a boil. Cook till the chicken is tender. Remove from heat and let it cool down a bit. Now add the soup in a blender and blend it to a smooth creamy texture. Remove it to the pan again and add a dash of water to correct the thickness. Season with salt and pepper. Remove, garnish with parsley and serve hot.