The gent let me go through "That information isn't available, but will be in a few months' time" and then joined me to traverse the lands of "because it's all subject to change" with a meander through "Even if you're happy to accept that the details may change, I don't have the details to give you".
We had a foray into " It's not that they're not to hand, I just don't have access to those details." prior to a ramble across "if we released unconfirmed details, it would cause visitor disappointment if details change" and he enjoyed the view at "You may be kind enough to appreciate the situation, but not all visitors are as understanding, forgiving or as smart as you! ha ha!"
He led us up towards "I can explain the process we use to help confirm details, but that won't get you any unconfirmed details or hints you can use to extrapolate from what has happened previously." Bit windy up there, but he wanted to take the detour.
Finally, we drew to a halt at "I can give you the email address for that department, and you can ask directly" with a cup of tea at "but you'll pretty much get the same reply..."