code: def run(self, dispatcher, tracker, domain):
      concerts = [
          {"artist": "Foo Fighters", "reviews": 4.5},
          {"artist": "Katy Perry", "reviews": 5.0},
      ]
      description = ", ".join([c["artist"] for c in concerts])
      dispatcher.utter_message(text=f"{description}")
      return [SlotSet("concerts", concerts)]
  
imports: from rasa_sdk import Action
  from rasa_sdk.events import SlotSet
label_desc: Use image node_id 2 for calling the ActionSearchConcerts obj's underlying member method code with example usage: obj.run(dispatcher, tracker, domain) and returns: list