Here is the list of libraries required

[peileppe]

$ pip install cython
$ pip install cymem
$ pip install srsly
$ pip install pyyaml
$ pip install wheel
$ pip install chatterbot
$ pip install chatterbot-corpus

then
$ python -m spacy info
$ python -m spacy download en

and finally program can run
$ python Pybot.py

worked with Python 3.6.9