[bluGill]

The rich can afford humans to do this job. While a lot of the jobs the assistant does would be easy to automate, the hard part is from the vague description of what they want to getting something acceptable. If I ask for "famous singer" do I need that singer, a cover band, or any band in that style, any live music, or a good DJ - depending on the situation any might be acceptable (and sometimes several of the above are not available at any price). Scheduling just the famous singer is easy - just send a calendar request and see if they accept (it is more complex than that, and odds are the singer isn't signed up for this service, but that is all details), but trying to figure out which substitute is available and acceptable is hard.