在V2对话流SDk中维护会话

Question

如何在对话框流SDK的V2版本中维护会话？ 代理在传递输入查询文本时中断会话。对于每个意图问题，我都会创建新的会话客户端，但会传递相同的会话ID。

    // A unique identifier for the given session
    const sessionId = req.data.rid;
    let config = {
        credentials: {
            private_key: req.data.agent.private_key,
            client_email: req.data.agent.client_email
        }
    }
    const projectId = req.data.agent.projectId;
    //this.sessionClient = new dialogflow.SessionsClient(config)
    // Create a new session
    const sessionClient = new dialogflow.SessionsClient(config);
    const sessionPath = sessionClient.sessionPath(projectId, sessionId);

    // The text query request.
    const request = {
        session: sessionPath,
        queryInput: req.req.queryInput
    };

    // Send request and log result
    const responses = await sessionClient.detectIntent(request);