Don't ask what it's regarding

I got a lesson a couple of days ago about inquiring into why people want to speak to the Councilman.  Before I start, realize that the way I talk to people on the phone, is how Stephen, the Chief of Staff taught me how.  He told me to always get information regarding the call to give to Mike.  He told me I don’t have to get details, just a broad description of the concern.  Well, the call I got today might have taught me otherwise.  So, I pick up the phone and say my routine and the person asks to speak to Mike.  I said he’s out of the office, but I’d be glad to help, or you can leave a message.  He told me his name and phone number and asked Mike to give him a call back.  I asked what it’s regarding and he said it’s personal.  I told him I need to have some information to give the councilman so he knows what the call is regarding.   HE GOT MAD! He told me its none of my business and I shouldn’t be asking.  He didn’t cuss at me, but I could tell he wanted to, and then I thought he hung up on me.  About a minute later, he called back, calmer, and said he was sorry the phone got cut off.  He started to tell me what it was about but all he said was how in his area, cops are giving tickets to black people.  I inquired, out of curiosity, not ignorance, if he was sure that they were not doing anything illegal.  He did not like that.  He started threatening that he was going to report me and how I won’t be here long.  I didn’t argue, I just said I will give the message to the councilman and then hung up.  Well, about 45 seconds later he called back and demanded my name.  I told him and then he hung up.  I don’t think I will follow Steve’s advice this closely anymore.