Xiàxīnɡqī wǒ huì qù wàidì chūchāi.

下星期我会去外地出差。

I'll be out of town on business next week.


Notes:

下星期(xiàxīnɡqī): next week

我(wǒ): I

会(huì): will

去(qù):to go

外地(wàidì): out of town, other city

出差(chūchāi): business trip

Example:

A：下星期我会去外地出差。

     Xiàxīnɡqī wǒ huì qù wàidì chūchāi.

     I'll be out of town on business next week.

B：好的。

     Hǎode.

     Ok.