This is he speaking.

我就是。

There is no one here by that name.

这里没有玲玲这个人。

Oh, she has an opening tomorrow at ten.

哦，她明天上午10点有空。

Thank you. The address is No.44 Changning Road.

谢谢你，地址是长宁路19号。

I need to cancel that. We have had a last minute change of plans.

我要取消预约，我们临时改变计划了。

Will you be so kind as to help me out of the difficulty?

帮助我克服困难，好吗？