No vm just trying figure out who it was

I received a call from a man at this number, he said he was returning my call from a few minutes ago. After explaining we did not call his number what number called you as we have many numbers, he commented, "so your sales?" I replied, no we are a Nationwide IT Services Company. I then asked him to repeat the number that called him so that I could confirm another person in our company hadn't called him and he only replied with "Oh ok, well never mind" and hung up.