Long rumoured voice assistant, codenamed “Cortana”, is all set to make its beta appearance on Windows Phone, starting April 2014, according to a very credible source – @msftnerd. The Siri-like feature is reportedly voiced by Jen Taylor, who actually did the voice acting for Cortana, an AI character in the hit game-series “Halo”. The voice assistant, which might carry the name “Bing Tell me”, will launch for developers, in beta, in April, which coincides with the Build 2014 Developer event by Microsoft. “Build” is where Microsoft plans to unveil information about the next release of Windows, codenamed Threshold.