Congratulations on your wedding!
I want to come to your wedding, but I'm so disappointed that I cannot make it to the wedding.
Alex has xxx(수업이름) lesson on Saturday.

I wish you all the happiness and love in your marriage.

이 정도면 될까요..?

congratulation on your anniversary.

i'd like to atttend your wedding, but i'm really sorry that i can't .

my son has a class at the same time.

i wish God bless you.

맨 마지막이 좀 이상하긴 하네요 ㅎㅎ