I integrated a sentiment analysis component into my chatbot. User messages are classified with a neutral, positive or negative sentiment provided as an entity. I am now thinking about ways to adjust the chatbot responses based on the extracted sentiment. I already implemented a custom action which cheers up the user if he is in a bad mood similar to the moodbot (rasa/examples/moodbot at master · RasaHQ/rasa · GitHub). However, I would prefer to make changes with more impact. I would suggest that the bot uses different styles of language based on the sentiment (e.g. adding emoticons based on the sentiment of the messages). What would be the best approach to do so?