@Niina4 At the end of the stay, you and the host both have 14 days to review each other. If your host writes a review but you choose not to, her review will automatically appear on your profile at the end of this 14-day period.
If you have a confirmed booking with a new host, and they later see a negative review appearing on your profile, it is definitely possible that they'll be uncomfortable with the booking. They always have the right to cancel it, but usually hosts face penalties from Airbnb if they cancel. Airbnb might make an exception if the host's feedback alleges serious misconduct, but I don't know that they'd offer a penalty-free cancellation merely over an accusation of inadequate cleaning. (Assuming that by "thirdy" what you meant was "dirty")