YOU SAID:

I'm sorry, but I won't be able to attend your party next weekend.

INTO JAPANESE

申し訳ありませんが、来週末のパーティーには出席できません。

BACK INTO ENGLISH

I'm sorry, but I won't be able to attend the party next weekend.

INTO JAPANESE

申し訳ありませんが、次の週末のパーティーには出席できません。

BACK INTO ENGLISH

I'm sorry, but I won't be able to attend the party next weekend.