Transaction Voice/chatbot using Dialogflow

We want to integrate a transactional bot into our Cooperative application Integration of a Voice/Chatbot which members could manipulate or carry out functions like below from our MySQL database Check balance from checking or savings account Ability to be able to give Previous transactions on account based on period selected Transfer money from one account to another one (using authentication like Fingerprint,Transaction code, username and password, etc) I want the code to be clean and well documented.