Chatbot on a content based site

We have a website that has a database of various business users in different sectors around the world who want to cross sell, network, have business problems solved etc. We want a chatbot that will make recommendations based on chats with users and if it does not have the answer in the database, say i will get back to you or something then alert my team. It must work on an "if/then" methodology

Chatbot must either ask pre defined questions then collect the data and answer questions etc.
Have you successfully deployed Chatbots on a content based site?
What Chatbots have you worked with?

Suggest a user flow that would work, but we would also need to have multiple flows worked out at some point.

Share your past projects from which we can deduct your competence in NLP, AI or ML. Link me a web url that has a chatbot you have made.

---

Skills & Expertise Required

Chatbot Machine Learning Data Science & Analytics 

---