YOU SAID:

come down for dinner when you want it

INTO JAPANESE

夕食が必要なときに降りてくる

BACK INTO ENGLISH

Come down to dinner is needed

INTO JAPANESE

夕食に降りてくるが必要

BACK INTO ENGLISH

Must come down to dinner

INTO JAPANESE

どうか食堂へ

BACK INTO ENGLISH

Will you come down to dinner?

INTO JAPANESE

どうか食堂へ

BACK INTO ENGLISH

Will you come down to dinner?