YOU SAID:
I am very sorry for the late reply
INTO JAPANESE
お返事が遅くなり大変申し訳ありません
BACK INTO ENGLISH
sorry for the late reply
INTO JAPANESE
返事が遅れて申し訳ありません
BACK INTO ENGLISH
Sorry for my late reply
INTO JAPANESE
私の返事が遅れて申し訳ありません
BACK INTO ENGLISH
sorry for my late reply
INTO JAPANESE
私の返事が遅れて申し訳ありません
BACK INTO ENGLISH
sorry for my late reply
Come on, you can do better than that.