Poor old DonDiego was unfamiliar with the EDC Las Vegas, so he looked it up online:
EDC Las Vegas
Last year's festival apparently included this:

DonDiego is still not familiar with the Electric Daisy Carnival, Las Vegas but, in any case, it looks way too strenuous for poor old DonDiego so he must send his regrets that he will not be attending. Oh, and he is certain that he will have business he must attend to elsewhere on those dates.