Since you're staying for consecutive nights, we'll clean the room sometime from 11am to 2pm tomorrow.
Since you're staying for consecutive nights,
連泊のため
consecutiveは連続、という意味ですね。
英語で直訳的な短い表現あまりないですが、
Since you'll be staying tomorrow too (明日も泊まるため)でもOKです。
we'll clean the room sometime from 11am to 2pm tomorrow.
明日の11時〜14時の間に清掃が入ります
housekeeping will come sometime between 11am to 2pmもOKですね。housekeepingは、清掃を行う店員、という意味です。
ご参考になれば幸いです!