calling girls, girls sometimes sounds sort of odd or disrespectful or something. im not sure what it is but it just doesn't sound right.
calling them young women is a completely outdated phrase.
there are a variety of sexist things like calling them chicks or babes or something.
o.k. so youd usually call them by their first name anyway but i cant seem to think of a right way to say girl/women/lady.
i find the word dude-ette amusing but id never really use it.
there just doesnt seem to be a right way.