This is interesting to me, because I work at a large company and I've found it to be orchestrated slightly differently. If you want/need something done here, the fastest way is to set up a face to face appointment and put yourself in someone else's calendar. If you don't, things will drag on for months of email back and forth. If you do, things might last two hours, you'll probably leave with a solid plan, and then usually someone sends a 'summary' email that lists every commitment made in that meeting (which keeps everyone honest) along with the dates people agreed to get them done by. If there's disputes about that, they're then handled there, but if you seem to always get the wrong idea from meetings (or always dispute what you said in them), it'd probably reflect badly on you.