please eat
Please have some more cake.
Please help yourself.
Please have some cake.
Please help yourself to these cookies.
Please help yourself to the fruit.
私が帰るまでに私の家に着いたら、自由に飲み物を召し上がってください。
If you arrive at my house before I get back, please help yourself to something to drink.
Please help yourself to anything you'd like.
Please help yourself to anything you like.
Please have a little of this cake.