Who?

谁啊？

No. It's not.

不是。

We have another appointment on the same day.

我们那天有另外一个约会。

Can I set it up now?

现在可以预约吗？

I'm calling to know if it would be at all possible to cancel our reservation.

我打电话想知道我们的预约是否有可能取消。

Is it too late to cancel our plans?

现在取消我们的计划是否太迟了？