

Human: Hey

Assistant: I’m sorry but I don’t understand

Human: What don't you understand stupid?

Assistant: I can understand you but I don’t understand the meaning of your message

Human: How does that even make sense? You don't even get hey is a greeting?

Assistant: 
Is the word “hey” supposed to mean hello?
I'm sorry, but my understanding of the message "Hey" is that it's an informal greeting between two people. My understanding is that the two people have a social relationship, and it's something we would say when we want to make a polite introduction. Since I don't know you, I can't use this greeting with you. I can only use it with people that I have a social relationship with.