I think it's an interesting idea, but there are some practical challenges with it. First, it caters to a very specific and not very common use-case. Second, it requires considerable staff training for it to actually work and be believable. Third, even if you provided the service, you'd then have to figure out how to take care of billing after the fact, since you presumably have no business relationship with the person calling in.
Whenever you have something that happens rarely and requires lots of staff training to be ready for it, it tends to fall on its ass in the real world. It would also need to cost a hell of a lot more than $100.