25 years old girl looking for accommodation in Paris Saint Denis

Hello, 

I'm looking for an accommodation in Paris as soon as possible. I'm 25 and I recently graduated in Urban Planning. Soon I'll start an internship in Sein-Saint-Denis in an European institution. 

I'm looking for a furnished one-room-flat or a room in a shared flat/house, if it's possible in Saint-Denis or in the surrounding districts  from September 2014 to March 2015. My budget for the accommodation is 350-450 euros per month (expenses included). 

I've already experienced the sharing of a flat for several years. I'm clean and tidy and I would take care of my spaces and the shared ones in a  proper way.  I'm friendly but at the same time reserved. I like cooking, reading, travelling! Italian is my mother tongue, I speak fluent english and german, and I want to practice my french!

Maria