from langchain.memory import ChatMessageHistory, ConversationBufferMemory

def get_memory():
    """
    Create a conversation memory with the latest LangChain syntax.
    """
    # Create a message history object
    message_history = ChatMessageHistory()
    
    # Create a memory that uses the message history
    memory = ConversationBufferMemory(
        memory_key="chat_history",
        chat_memory=message_history,
        return_messages=True,
        output_key="output"
    )
    
    return memory