YOU SAID:

when are we going to have lunch

INTO JAPANESE

とき我々 は昼食を持っているつもり

BACK INTO ENGLISH

If we're going to have lunch

INTO JAPANESE

私たちは昼食を持っているつもりなら

BACK INTO ENGLISH

We're going to have lunch

INTO JAPANESE

私たちは昼食を持っているつもり

BACK INTO ENGLISH

We're going to have lunch