Looking for a home

Hello everyone!
I am an economics-political science exchange student at Hertie.
I am currently looking for a short term apartment from the beginning of February to the end of June (even something for a shorter period is ok). Either a studio apartment or a single room or a two bedroom apartment to share with my best friend (that is also doing an internship in Berlin) are fine.
I need a pet friendly house for my rescue dog (Ziggy), he is calm and used to live in apartments (even small ones) and he never caused any issue in any of our homes.
I do not have any particular requirements other than this, anything is fine as I easily adapt.
For a two bedroom apartment the max budget would be 1800 euro, while for the room/the 1 room apartment it is 1200 euro.
Thanks in advance for any help!
Kindest regards,
Martina