Im looking for accommodation in the center of Lisbon

Im Ricardo Prado from Mexico Im looking for apartment or residence near the center of the city because i would like to be close to my school (ISCTE), Im a respectful and neat person, i like party, no pets and no smoking.

I would like to find a clean room and where you can safely leave my things , I also look to have all the services like ( water, electricity , gas , internet, etc ).

if you know any room no more than 300 euros please contact me.