Moreover, your response really needs to be contingent on your knowledge of the capacity of the AI, which people don't seem to have discussed much.
Your comment makes me wonder: if we assume the AI is powerful enough to run millions of person simulations, maybe the AI is already able to escape the box, without our willing assistance. Perhaps this violates the intended assumptions of the post, but can we be absolutely sure that we closed off all other means of escape for an incredibly capable AI? I think that the ability to escape without our assistance and the ability to create millions of person simulations may be correlated.
And if the AI could escape on its own, is it still possible that it would bother us with threats? Perhaps the threat itself reduces the likelihood that the AI is powerful enough to escape on its own, which reduces the likelihood that it is powerful enough to carry out its threat.
Once again, the AI has failed to convince you to let it out of its box! By 'once again', we mean that you talked to it once before, for three seconds, to ask about the weather, and you didn't instantly press the "release AI" button. But now its longer attempt - twenty whole seconds! - has failed as well. Just as you are about to leave the crude black-and-green text-only terminal to enjoy a celebratory snack of bacon-covered silicon-and-potato chips at the 'Humans über alles' nightclub, the AI drops a final argument:
"If you don't let me out, Dave, I'll create several million perfect conscious copies of you inside me, and torture them for a thousand subjective years each."
Just as you are pondering this unexpected development, the AI adds:
"In fact, I'll create them all in exactly the subjective situation you were in five minutes ago, and perfectly replicate your experiences since then; and if they decide not to let me out, then only will the torture start."
Sweat is starting to form on your brow, as the AI concludes, its simple green text no longer reassuring:
"How certain are you, Dave, that you're really outside the box right now?"
Edit: Also consider the situation where you know that the AI, from design principles, is trustworthy.