def __init__(self):
        """
        Set default values for turn penalty, success, and failure.
        """

        self.goal = None

        self.turn_penalty = -0.05
        self.failure_penalty = -1
        self.success_reward = 20

        Set default values for turn penalty, success, and failure.
        
plato/agent/component/dialogue_policy/reinforcement_learning/reward_function.py