Thank you for the answer.. it is reassuring.. I was afraid they would tell me , with an email, and then, having no nice alternative...When we called, we got everything we wanted, so I can't say for sure, but the Vacationista was reserving them for us as we went, so my assumption would be that if they *can't* reserve it, they'd tell you, and work with you to figure out an alternative.
Sayhello