YOU SAID:

I went to a party and pet a dog

INTO JAPANESE

パーティーに行って犬をなでました

BACK INTO ENGLISH

I went to a party and stroked the dog

INTO JAPANESE

パーティーに行って犬を撫でた

BACK INTO ENGLISH

I went to a party and petted a dog

INTO JAPANESE

パーティーに行って犬を撫でた

BACK INTO ENGLISH

I went to a party and petted a dog