YOU SAID:
その日空いてますか?
INTO JAPANESE
その日空いてますか?
BACK INTO ENGLISH
Are you vacant that day?
INTO JAPANESE
あの日は空いてる?
BACK INTO ENGLISH
Is that day free?
INTO JAPANESE
その日は無料ですか?
BACK INTO ENGLISH
Is that day free?
You've done this before, haven't you.