There are chairs in the salons, there are magazines, there are pictures on the wall, pick one that you want, point to it, and say "this is what I want".
I told my hairdresser directly, (after a deep breath), "I am going thru a change, and I need a feminine cut". She understood perfectly. I got the color and cut advice I needed, and she had been doing my hair for almost a year before I told her this. So even tho she had been cutting my hair short (think military cut), she did exactly what I expected of her.
Hairdressers are not mind readers. You MUST tell them exactly what you have in mind. If you can't, point at a picture and say, "that". If they come at you with a hedge trimmer, stab them in the heart with their own scissors. (I'm kidding, but you know what I mean)