“What do you look like, Cortana?” (Chuckles) “I am a circle now, but I have ambitions,” the sweet AI smiled. “One day, I’ll be a sphere.” A conversation between Cortana and a human, Emily Alhadeff Cortana is Microsoft’s friendly AI. If you don’t know her, she’s that friendly circle on your task bar that says “Ask me anything.” From Windows PCs to mobile phones, Cortana has become a staple symbol of a friendly AI companion in pop-culture….