This is a bad idea. Used to do call centre customer service, and while it wasn't implemented on our side, some contacts that got routed to us seems to be handled by chatbots before, and people aren't happy.
Human condition is complex, organic, often unique circumstances. A brain dead statistical machine like AI cannot be expected to handle these things well.
Now, if it is for health related big data analytics, like epidemic modeling, demographic changes, effect of dietary patterns (notoriously hard to model actually), then I don't see anything wrong with that. Caring for people? No way.
It's not going to be about patient interaction, at least not at first. This is about EMR-intrgrated analytics and diagnostic tools intended to help streamline the workflows of overworked doctors and nurses and to identify patterns that humans may miss.