Doing specific exercises for the areas of the bpdy where you hold the most fat won't make you lose the fat that is there. When you do exercises, such as lunges for example, you are working the msucles of the glues and thighs. This can make the muscles increase in endurance, strength, or possibly size under the right circumstance. But it does not make the fat in those areas go away.
You can lose fat in your lower body through a solid exercise and nutrition program. You may also want to consider trying to increase a bit of mscle size in your upper body to even our your proportions.