I need to create a simple Chatbot style Decision Tree

I need to create a simple Chatbot Decision Tree. A bit like a simple Virtual Assistant.

The chatbot will just take the user through a series of scripted questions, and provide them a final decision.

It won't require any NLP, the user will be asked fixed questions, and with multiple answers to select. The flow will have branching logic that will determine the next question, dependent on the previous answer given. At the end of the full question flow, the user will need to have a pdf of the final outcome emailed to their inbox.

I've provided a super simple image of the flow. Our version will need lots more questions, this is just an example.

It'll need to look user friendly and professional. It'll need to be built to allow for further customisation in terms of changing questions or branching logic flow.

I need someone who's done this before and is comfortable.

Please respond with 'grey squirrel' in your response, so I know you've read this in full and you're not a BOT! :-)