Create a chatbot using the conventional method but only using Select, Text, and Statement question types.
Make sure to add logic jumps to every option in Select question types.
Train your chatbot with success and failure questions configured.
To transfer to an agent, jump an option under a Select question type to Stop after. (Make sure you have not chosen multi-select or dropdown. It must be a select one configuration.)
Live chat mode will activate when clicked on the selected option and the chatbot will stop.
The chatbot will automatically resume after 1 hour.