YOU SAID:

Hi I’m having a party tonight wanna come

INTO JAPANESE

こんにちは、今夜パーティーをするんですが、来てほしいです

BACK INTO ENGLISH

Hello, I'm having a party tonight and would like you to come.

INTO JAPANESE

こんにちは、今夜パーティーがあるので来てほしいのですが。

BACK INTO ENGLISH

Hello, there is a party tonight and I would like you to come.

INTO JAPANESE

こんにちは、今夜パーティーがあるので来てほしいのですが。

BACK INTO ENGLISH

Hello, there is a party tonight and I would like you to come.