When you are in a dream, then, unless you are lucid, you think you are in the real world. So instead of saying to yourself that you are going to fly in a DREAM, maybe if you say that you will fly in real life (when going to bed), this will carry over in the dream, and since dream logic is totally bullsh*t you will remember that you wanted to fly.

Maybe then you'll try, and you could fly. You wouldn't automatically be lucid, but it would still be great to fly anyway