22 years old girl, greek student is looking for accommodation/roommates in Madrid

Hi, I am Irene and I am a 22 years old student in Greece. I will do a 3 months internship in Madrid (october-december) at UCM departement of chemistry. I am searching for accomodation and roommates for these months. I would like to live in a flat with other students from all over the world. I speak french, english and-not fluently- spanish.! I prefer a flat in the center of the town but not far from the uni.
I am a sociable person, friendly and curious to meet new people and cultures. I love travelling and pets.! Let me know if anyone is interested.
                                                                        Irene :)