See Kevin Lacker‘s January 2011 answer to my very first Quora question:
Should chat bots have a first and last name, like people do?
No, it is too creepy. It evokes images of a dystopian future where faceless entities control us all, like in Jennifer Government.
Think of cute adorable robots like Wall-E or tweenbots and try to make things like them. Your chat bot will be inept in many ways and if you want people to interact with it regardless then they should perceive it as childlike rather than incompetent.