looking for a single room flat near TU Dortmund

I have secured admission at TU dortmund for masters. I am moving to dortmund by September end. I am looking for a single room flat which is ready to occupy by the end if September. The flat should to be near to the university and furnished with necessary amenities. I am sure I can maintain the flat properly.
I am from India. I would like to spend my free time cooking, reading and chatting with people. I am looking for a flat that is easily accessible to the university and also it would be better if there are supermarkets nearby. I am ready to take the flat if it is as per the needs. I will have no pets and no smoking.
I am searching for flats for long time now. Anyone with flats please share the details and I will mostly decide on taking the same.
Hoping to find one