Preheat oven to 400° F. In a food processor, combine cream cheese, olives, garlic, capers and artichoke hearts; pulse until combined and ground. Unroll puff pastry sheets and smooth any creases. Cut each square in half to make four pieces. Spread each square with 1/4 of the artichoke mixture, leaving edges clean. Place a 1/2 of a can of drained chick-en over half of each puff pastry piece. Brush edge of pastry with water and then fold pastry over and seal the edges with a fork to enclose chicken. Bake for 20 to 30 minutes or until pastry is puffed and chicken is cooked through.