What happens to the practice if it's raining on that day?
Will you have the practice rescheduled for another day?
Or would you be refunding the money for the cancelled practice?
ご質問ありがとうございます。
① "What happens to the practice if it's raining on that day?"=「その日に雨が降っていたら練習はどうなりますか?」
② "Will you have the practice rescheduled for another day?"=「練習は違う日にリスケジュールされますか?」
③ "Or would you be refunding the money for the cancelled practice?"=「それとも、キャンセルになった練習の分、返金されますか?」
ご参考までに。