As of this writing, Amazon has thousands of sources for flash briefings. The sources they include can be hyper-local like your local news station. Amazon also has specific topics like tech or business, or general info. Many of these sources, like NPR, are podcasts provided by Tune-In. These briefings are audio files Alexa plays for you. Other sources like the AP news stories are read in Alexa’s voice. I wish Amazon told you which ones were audio files because her voice drones on after a while. I hope I get to change her voice like I can with Siri. Right now, you can just change the language to the English (UK) or German.
Amazon's Alexa is the voice-activated, interactive AI bot, or personal assistant, that lets people speak with their Amazon Echo, Echo Dot and other Amazon smart home devices. Like Siri and Cortana, Alexa is designed to respond to a number of different commands and even converse with users. Alexa comes with more than a few capabilities: playing music, pulling up the weather or even reading news. But Alexa Skills are apps that give Alexa even more abilities, letting her speak to more devices even websites.
If you want to do some casual research for a future trip, you can get fare estimates using the Kayak skill. You can say, "Alexa, ask Kayak where I can go for $400" or "Alexa, ask Kayak how much it costs to fly from Los Angeles to Dublin." The skill will ask for additional information and eventually provide you with a series of options and price ranges.