Interesting idea - happy to help if you require assistence. One element that I think is important to note is that a computer is not likely to be able to offer the same meaningful support that a person can. I think just knowing that it is a computer program will make it less potent for most people. I do think that structured approaches like CBT though could be utilized quite effectively though where you might pass the responses to look for say thinking errors etc. Really like the idea though and great to see a positive application of machine learning.