I tried to order a coffee on an airplane, but my pronunciation wasn't very good and the flight attendant brought me a coke instead.
この場合、次のような言い方ができますよ。
ーI tried to order a coffee on an airplane, but my pronunciation wasn't very good and the flight attendant brought me a coke instead.
「飛行機でコーヒーを注文したら、私の発音が悪くて、客室乗務員がコーラを持ってきた」
my pronunciation wasn't very good で「私の発音があまり上手じゃなかった」
ご参考まで!