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.