I'm a 20 year old student, doing history, looking for accommodation in Berlin for the Summer.

I'm a 20 year old student, doing history at Oxford, looking to come over to the Berlin for the Summer to improve my German.  I'm planning on staying in Berlin from late July to mid September though the departure date is flexible. I am primarily looking for shared acommodation and wish to so socialise with any roommates as my main aim in coming to Germany is to improve myconversational German. If you have a room available please get in touch. Thanks.