Lǎobǎn chūchāi le.
老板出差了。
The boss is on the business trip.
Notes:
老板(lǎobǎn): boss
出差(chūchāi): be on a business trip
了(le): particle word
Example:
A:老板在哪儿?
Lǎobǎn zài nǎr?
wher’s the boss?
B:老板出差了。
Lǎobǎn chūchāi le.
The boss is on the business trip.