YOU SAID:

Leni is my sister and we have a dog named lola

INTO JAPANESE

レニ、私の姉でありという名前の犬ローラ

BACK INTO ENGLISH

Leni, my sister's dog is named Laura

INTO JAPANESE

レニ、妹の犬の名前はローラ

BACK INTO ENGLISH

Leni, my sister's dog's name is Lola.

INTO JAPANESE

レニ、妹の犬の名前はローラです。

BACK INTO ENGLISH

Leni, my sister's dog's name is Lola.