When will she come back?

她什么时候会回来？

Please inform him that Chen Gang was calling.

麻烦你通知他陈刚来过电话。

We're already scheduled elsewhere.

我们已经有其他安排了。

Hello, this is Wang Ming. May I speak to Gao Ling, please?

喂，我是王明，我可以和高玲通话吗？

I'm just calling to confirm your appointment tomorrow at 3:00 p.m.

我打电话确认明天下午3点你约定的时间。

No, thanks.

不啦，谢谢。