Can I show you around.

我来带你四处看看好吗？

And here's mine.

这是我的。

You can say that again.

说的是。

We haven't received your order yet.

您的订单我们还没收到。

We can't process your damage claim.

我们无法办理你的索赔。

I would suggest that you use this material instead of that.

我建议你改用这种替代那种。