
As the OP came back to point out, she DIDN'T ask this question. Turns out what she wanted to know was whether or not reservations for the 3rd person could be cancelled if necessary. Who knew? We all went down the same rabbit hole in discussing the issue of who pays for what.
And for the record, I've followed this thread since the beginning and only one person actually said
they'd be offended if they were invited and also asked to pay some of their own way. The vast majority of us that were on the side of "host pays for everything" simply said that if we were doing the inviting, we'd also expect to be paying. And that's not just rhetorical; many of us have actually done it. I'm not sure where your application of the term "entitlement" comes into play in such a scenario.