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If however the user's utterance is understood at state 3 the elevator moves to state 4.
If however the user's utterance is understood at state 3 (that is, if a floor number is understood that makes sense as destination floor), the elevator moves to state 4. From there a transition follows for the confirmation of the floor understood. After this, the elevator is in state 5. If then the user corrects the elevator, we are back at state 4 (confirmation to come). This can end up in an infinite loop.
?- Question!
Can you trace the loop in the dialogue model?
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