YOU SAID:

Ollie went to the party to get a phone

INTO JAPANESE

オリーは電話を取るためにパーティーに行きました

BACK INTO ENGLISH

Ollie went to the party to get the phone.

INTO JAPANESE

オリーは電話を取りにパーティーに行った。

BACK INTO ENGLISH

Ollie went to the party to get his phone.

INTO JAPANESE

オリーは携帯電話を取りにパーティーに行った。

BACK INTO ENGLISH

Ollie went to the party to get his cell phone.

INTO JAPANESE

オリーは携帯電話を取りにパーティーに行った。

BACK INTO ENGLISH

Ollie went to the party to get his cell phone.