Scheduling a simple coffee meeting can take days and countless emails to complete, but Dennis Mortensen wants to change all that -- and more. In episode 623 of “This Week in Startups,” the founder of x.ai show us his AI assistant, which sets meetings for you like an actual human. He also shares his thoughts on Siri, Echo, the Danish tax system, his vision for x.ai’s AI assistants conquering other tasks, and the future of artificial intelligence.