Well, there's obviously some real reflection on the floor - you can add that in DS. The simplest way is to open the Surfaces palette (View>Tabs>Surfaces), switch to the Surface selection tool (from the Tools menu) and click on one section of floor (which will highlight) - it looks as if the floor is modular, so you may need to add the other sections by holding down the cmd(Mac)/ctrl(Windows) key and clicking on those. Go to the Surfaces palette, switch to the Advanced tab, scroll down and set the reflection strength to a middling value (you don't want 100%, ir isn't a perfect mirror) and a light colour; scroll right down and set the Lighting model to Glossy(Plastic). Try rendering that - it may work, or you may need to adjust the Specular settings (it looks as if it should have a fairly high glossiness and a moderate to high Specular strength).

If the walls are looking murky, you may need more lights or you may want to select those surfaces and turn up the ambient strength or lighten the Ambient colour.