How to say “Change conditions: non-refundable booking, full payment before arrival and additional charges for any change after confirmation.” in Japanese

In Japanese

変更条件(へんこうじょうけん)：予約料金(よやくりょうきん)の返金不可(へんきんふか)、到着前(とうちゃくまえ)に全額支払(ぜんがくしはら)い、確定後(かくていご)の変更(へんこう)には追加料金(ついかりょうきん)がかかります。

Henkō jōken: yoyaku ryōkin no henkin fuka, tōchaku mae ni zengaku shiharai, kakuteigo no henkō ni wa tsuika ryōkin ga kakarimasu.