YOU SAID:

I was only planning to have dinner with you.

INTO JAPANESE

私はあなたと夕食をとるだけでした。

BACK INTO ENGLISH

I just had dinner with you.

INTO JAPANESE

私はあなたと夕食をとりました。

BACK INTO ENGLISH

I had dinner with you.

INTO JAPANESE

私はあなたと夕食を食べました。

BACK INTO ENGLISH

I had dinner with you.