YOU SAID:

i'm not sure, because soon after I finish class I'm going out to dinner for my dad's birthday

INTO JAPANESE

よくわからないけど、授業が終わったらすぐに父の誕生日にディナーに行くから

BACK INTO ENGLISH

I'm not sure, but I'm going to dinner for my father's birthday as soon as class is over.

INTO JAPANESE

よくわかりませんが、授業が終わったらすぐに父の誕生日の夕食に行きます。

BACK INTO ENGLISH

I'm not sure, but I'm going to my dad's birthday dinner right after class.

INTO JAPANESE

よくわかりませんが、授業が終わったらすぐに父の誕生日ディナーに行きます。

BACK INTO ENGLISH

I'm not sure, but I'm going to my dad's birthday dinner right after class.