Háiyǒu kōnɡ fánɡjiān mɑ?
还有空房间吗?
Do you have any rooms available?
Notes:
还有(háiyǒu): still have
空(kōnɡ): empty
房间(fánɡjiān): room
吗(mɑ): question word
Example:
A:还有空房间吗?
Háiyǒu kōnɡ fánɡjiān mɑ?
Do you have any rooms available?
B:对不起,没有了。
Duì bù qǐ. Méi yǒu le.
Sorry. We don't have any room available.