Please wait for a while―for a little while.
I am sorry that I make you wait.
I am sorry that I kept you waiting.
お待たせして申し訳ありませんでした.
I'm waiting for you
もう待ちくたびれた
I got tired of waiting for you.
I apologize for making you wait.
少し待ってくれ
少し待ってくれ
Please wait there.
I am terribly sorry, but please wait momentarily.