I'm a Japanese woman with a pet(a small chihuahua), looking for accommodation in Bratislava

I will become a med. Student in Comenius University in Bratislava from September in this year.
I need a single room for me & my dog in flat share. I need a clean and cozy room safe for my dog and for me to concentrate on my study. I hope the location of accommodation near Comenius University. I'm a non smoker, so I want non smoker roommates and also a person friendly to my dog. I don't care about roommates  genders/ages/countries/students/workers. Once I lived in London and now have some international friends including European. I’m an almost vegetarian, so have a peaceful mind. I could pay 450 euro at most for the ideal accommodation Including all utilities and wi-fi.