It looks from your code like you tried FollowupAction
which is the way to do this.
slot_events.append(FollowupAction("utter_hello_form"))
However, I don’t generally use FollowupAction
as a first approach. The rules & stories in the financial-demo show a good approach to forms.
I created a branch with the change and some comments/questions on your pipeline in NOTES.md.