Regarding this scene -
does it mean that Team Flare is involved in some way with the organisation of the Lumiose Conference? Thinking about from a real world point of view, lots of criminal organisations have legitimate front operations. Also, that would explain away their big trucks full of weird scientific equipment to anyone who saw them and why they're setting it all up in the Lumiose Gym, they could claim it's League business/research and they're using that because it's the most suitable place in the same city
Nope, it's just Lysandre thanking the man for arranging to occupy him for the league finals in such a short notice, with the man replying that its not a problem to occupy a Celebrity like him.
Man, the finals are here, manon doesn't want to meet Alan, and Team Flare hijacking the gym when it is closed. I think this is the reason everything is going on during the league.
This was a very good setup episode, Sycamore and Lysandre meeting Alan and Ash. The finals and the flare arc is going to be amazing...