to offer an apology; to make one's apologies/excuses; to apologize; to beg somebody's pardon
Apologize to your neighbour!; Say (you're) sorry to your neighbour!
It wouldn't actually hurt to say thank you/sorry, would it?
I'm not satisfied with an apology!
(I am) sorry; excuse me; pardon; I beg your pardon
So we have two, sorry, three options