约人吃饭的英语口语表达

I'm calling to see if you would like to have lunch tomorrow. 我打电话给你，是想知道明天一起吃顿中饭怎样？
I'm sorry, but this week isn't very convenient for me. 对不起，这个星期我都不方便。

Perhaps we van make it later. 那么，也许改天吧。
That would be better. 好啊。

来源:和谐英语学习网-口语频道