Jiaqi Pan made this product
Hi Bettina, sorry that I didn´t read this full request before.
If you are looking for native interface based chatbot, landbot would be a good option. It´s still in early stage already offers most features you need.
The only question left is in terms of building process we are quite similar to Tars. How ever if your logic tree is well structured which it seems to be, my team can help you to build it automatically so you don´t need to do it manually. Would this solve your problem?