I want to build a robot dog th

I want to build a robot dog that will interact with my family. It will not only recognize faces, but also have a personality with the ability to talk and ask us questions and respond to our questions. I guess this is part artificial intelligence (AI), but I want to be able to control and change the jokes, questions to ask people and it's overall behavior. I want the robot dog to be autonomous without the need for me to constantly connect it to a computer to get it to move. If more processing power is needed, maybe I could use an old cell phone to assist in running the robot dog (and cell phones are rechargeable.) This is all new to me, so I'm just starting out.