North American girl seeks central flat w/contract...

Hey, ya'll I'm a 22 year old North American girl who's going to work as an auxiliar de conversación in Alcalá de Henares, so it'd be nice to find a place that's well connected with Avenida de América (lines 4, 6, 7, 9). I expect to arrive in mid September. I want [preferably female] roommates that are close to my age, quiet (not extreme party people), reasonably clean and organized (but not overkill clean freaks), and chill. They need to be Spanish speakers (wenn sie deutsch sprechen, sehr schön!!), and (most importantly) NON SMOKERS.