You may not smell the fragrance because you are so used to it, but others usually do. I never thought my hair retained the shampoo/conditioner smell either until there was this one weird chick at work who would walk up behind me and smell my hair and comment on it. Seriously freaky. So it probably smells just like the shampoo, you just don't notice it anymore.
You can make your hair smell good by washing your hair regularly using a pleasant scented shampoo. You should also make sure that you leave your hair to dry completely before applying any hair products on it. You can get more tips on http://www.ehow.com/how_4494636_make-hair-smell-good.html.