Funny. I filed a patent for this same thing in 2015 and it was rejected for not being novel. https://patents.google.com/patent/US20160332079A1/en
There are probably 1000's of issued patents for chat bots each one claiming different hows.
Care to list the claims in your patent you think are the same as the MS claims?
I haven't looked at the google patent listings before. What are the 'Similar Documents' at the bottom about? Black Twitter? https://patents.google.com/scholar/10521028305159378504