YOU SAID:

I didn't eat dinner because I was at the airport

INTO JAPANESE

空港にいたので夕食は食べませんでした

BACK INTO ENGLISH

I did not eat dinner because I was at the airport

INTO JAPANESE

私は空港にいたので夕食を食べませんでした

BACK INTO ENGLISH

I did not have dinner because I was at the airport

INTO JAPANESE

私は空港にいたので私は夕食を食べませんでした

BACK INTO ENGLISH

I did not have dinner because I was at the airport