2-Stage Fallback Policy not working

Rasa Open Source
1

Hi,

I’m unsuccesfully trying to use the Two-Stage Fallback policy.

As you can see in this example: image
Instead of asking the user of reformulating the message, it just asks again if the intent was correct and then it never triggers the default fallback.

My config file is the following:

language: en
pipeline: supervised_embeddings

policies:

  - name: TwoStageFallbackPolicy 
    nlu_threshold: 0.3
    ambiguity_threshold: 0.1
    core_threshold: 0.3
    fallback_core_action_name: "action_default_fallback"
    fallback_nlu_action_name: "action_default_fallback"
    deny_suggestion_intent_name: "out_of_scope"

  - name: MemoizationPolicy 

  - name: MappingPolicy 

  - name: EmbeddingPolicy 
    max_history: 10
    batch_strategy: balanced
    epochs: 5
    random_seed: 1234
    evaluate_on_num_examples: 0

Thank you! Tiziano

2

Hi @tiziano. Do you have out-of-scope intent in your domain/nlu data as well?

3

Hi @Juste, yes I do