src/transformers/pipelines/conversational.py/Conversation/__init__
class Conversation:    def __init__(
        self, text: str = None, conversation_id: uuid.UUID = None, past_user_inputs=None, generated_responses=None
    ):
        if not conversation_id:
            conversation_id = uuid.uuid4()
        if past_user_inputs is None:
            past_user_inputs = []
        if generated_responses is None:
            generated_responses = []

        self.uuid: uuid.UUID = conversation_id
        self.past_user_inputs: List[str] = past_user_inputs
        self.generated_responses: List[str] = generated_responses
        self.new_user_input: Optional[str] = text