YOU SAID:

I'm going to eat dinner

INTO JAPANESE

私は夕食を食べるつもり

BACK INTO ENGLISH

I'm going to have dinner.

INTO JAPANESE

夕食を持っているつもりです。

BACK INTO ENGLISH

I am going to have dinner.

INTO JAPANESE

夕食を持っているつもりです。

BACK INTO ENGLISH

I am going to have dinner.