If it's pooling in one area you could do as redfin suggested make some some cuts in the concrete and angle them towards the drain. I do concrete sawing and drilling and have done this for several customers over the years. I usually recommend 1/4" wide cut or cuts depending on how big the pool is, lines are scored from 1/2" deep from pooling point and have fall on the cuts down to about 1" or a little better leading to the drain area. You have to make sure to keep the cut lines clean of dirt and as mentioned this only works where water is pooling in one specific area.