Casual — to friend
Laundromat
前の人の洗濯物が残ってるんだけど。 — The previous person's laundry is still in here. (Laundromat, Casual — to friend, JLPT N4)
You
前の人の洗濯物が残ってるんだけど。
まえのひとのせんたくものがのこってるんだけど。
The previous person's laundry is still in here.
Romaji: Mae no hito no sentakumono ga nokotterun dakedo. / Reply Romaji: A, gomen! Sugu dasu ne.
Reply
あ、ごめん!すぐ出すね。
あ、ごめん!すぐだすね。
Oh, sorry! I'll take it out right away.
Gesture & etiquette
Pointing toward the laundry machine while giving a quick apologetic bow or wave.
Avoid being rude even when pointing out the mistake, as the other person likely just forgot.