Nonexistent but similar entity values are saved into slots

Entity values that do not exist but look like the value are saved in slots and hence saved in the stories made during interactive mode. The chatbot will fill in the wrong slots in the answer he returns to the user.

Story to illustrate the problem: “Hi” “Hello” “I decided to buy the product” “In which currency would you like to do the transaction?” “Can I do this transaction in dirtydollars?” “The transaction will be done in dirtydollars. Can I help you with anything else?”

(entity: currency_type, mapped_value: dirtydollars, confidence: 0.7797) (slotname: currency_type, slot_value: dirtydollars)