YOU SAID:
Hello! My name is not Lucas
INTO JAPANESE
こんにちは!私の名前はルーカスではありません
BACK INTO ENGLISH
Hello! My name is not a Lucas
INTO JAPANESE
こんにちは!私の名前はルーカスではありません
BACK INTO ENGLISH
Hello! My name is not a Lucas
That didn't even make that much sense in English.