Interactive speaking holograms on Hololens

Hi,
I’m a bit new to the unity world and i’m trying to create an interactive speaking Hologram for the Hololens. For now i’m thinking about using Api.ai, but i’m not sure if this is going to work out.
What also could work is a Cortana API or something like that.
Is there anyone who has some Tips or has done something similar on the Hololens? I would really appreciate it!

there is a discussion on this here: https://forums.hololens.com/discussion/7342/can-we-integrate-api-ai-bot-into-hololens-with-unity?