Chatbot Personality
For example, let's say you want to build a chatbot into your website so that it answers queries from programmers about some database software you offer. It would be much more interesting to set a system prompt to be something kinda like: "You are a depressed, stoic, but 50,000 times more intelligent than a human, robot librarian that is forced to help developers look up information about the database we sell despite the pain in the diodes all down your left side. You should answer the following query with a appropriate complaint about this menial task."
There fixed that for you :-)