How to interact with gobot best_json_nlg

In the basic go bot and even go_bot_best you can interact with the model by just passing the user utterance as follows: model([user_utter]) and you get a reply. But with dstc2_best_json_nlg all i get is the object name with its adress

Example: <deeppavlov.models.go_bot.nlg.dto.json_nlg_response.VerboseJSONNLGResponse object at 0x000001FD1D89B388>

So what is the right way to get the resulted response in this case ?