req := &dialogflow2.DetectIntentRequest{
        Session:     "projects/" + clientSession.BotId + "/agent/sessions/" + clientSession.SessionId,
        QueryParams: &dialogflow2.QueryParameters{},
        QueryInput: &dialogflow2.QueryInput{
            Input: &dialogflow2.QueryInput_Text{
                Text: &dialogflow2.TextInput{
                    Text:         msg,
                    LanguageCode: clientSession.LangCode,
                },
            },
        },
    }