I am using Rasa SDK and created manual agent. So using handle_message I predict the response and if response intent is out_of_scope or low confidence then I ignore the Rasa response and predict the response using other AI models.
Now the response that I ignored can open the slot, so my flow is disturbed, As i ignored this low confidence response, but next queries can act according to the opened slot.
You can reset the slot by sending a SlotSet('slot_name', None) event from the SDK. You might also be interested in UserUtteranceReverted events. Generally, this guide for fallbacks and human handoffs should be useful.
This should work for any regular slot. It looks, though, as if you want to set the special requested_slot slot, which is used internally by Rasa forms. To reset this, it is better to use the action_deactivate_loop, as described here.