Will a stylist cut your hair into layers if it your hair reaches your waist?

Okay, my hair literally reaches my waist. Its that long. And i LOVE long hair. I really, really don't want to cut it. Of course I trim it, but I never want or am going to cut it short. But I'm pretty tired of curling it, and then waiting 5 minutes for the curls to flatten out. So I've decided on getting layers but my sister has told me that stylist wont cut your hair in layers if its that long. That they're going to have to cut the length to be able to layer it. I REALLY would want it to stay the same length if i did get the layers done. Is this true? OH and does layers give you much more thinner hair? I also have really, really thick hair and I don't want to thin it out. Does it only get thin if they use a razor? I HATE bulky straight-across layers I've seen on some girls, though. Oh yeah, I almost never style my hair. I usually just straighten my bangs. And I've heard that if you get layers, your hair gets really poofy&&you have to style it everyday. Is that true also? Please help. I want a change in my hair, but I REALLY don't want a dramatic change like cutting the length. Should I just stay with the style I have now considering the fact I dont like the consequences that come with getting layers?