Looking for a room to rent in Berlin during my internship period

Hi! I am an Italian student who is going to spend three months in Berlin as a trainee in Bosch from February 10 to May 14,2017. I was looking for a room to rent in a calm apartment. I will be working 8h/day and in the evening I would have to study for my thesis, that's why I would prefer a quiet apartment. My ideal room has private bathroom and a kitchenette (or a kitchen to share with other flat mates).
In case of sharing an apartment with other people, I would prefer to share it with other girls.
The maximum rent per months would be 500€.

Hoping that someone has a good offer to me,

Kind regards

Monica