You can buy tickets using voice commands now that Ticketmaster has given Alexa access to its events. If you've got nothing particular in mind, say "Alexa, open Ticketmaster." You can also ask the voice assistant to look for events you can go to with the date range and location you have in mind. For instance, you can say "Alexa, ask Ticketmaster to find events this weekend" or "find concerts in [a specific area]." Looking for tickets for a particular event? Just use the artist's or team's name: "Alexa, find Miami Heat/[another team or artist] tickets." You can select your seats and finalize your order from there.
While Ticketmaster's service fees are almost universally hated -- and according to previous reports, the company has pretty shady business practices -- having the option to purchase tickets through an Echo speaker sounds like a cool addition if you're buying one anyway. So long as you link your Ticketmaster account with Alexa, you'll be able to use the feature. That is, if you're in the US. It's only available in the US at the moment, though it will make its way to other countries in the future.