Well, yes, with the right programming, any computer can do anything.
Watson is not a magical machine that can read a flight manual and suddenly can fly a plane. It's a first step towards a good search engine, and that's all. It's not even able to properly interact with humans, because that's not what it's designed for. It takes questions, and searches for answers in a big database, and that makes it an excellent contestant in Jeopardy. But not in a conversation.