YOU SAID:
What brings you in today, sir?
INTO JAPANESE
どうして今日、サー?
BACK INTO ENGLISH
Why today, Sir?
INTO JAPANESE
だから今日は、先生ですか?
BACK INTO ENGLISH
So today, Sir?
INTO JAPANESE
そこで今日は、先生ですか?
BACK INTO ENGLISH
So today, Sir?
That didn't even make that much sense in English.