1.  Open a file webChatConfig.js
2.  In this file find a line:
        pagePushMessageText : 'Agent sent the following link: ',
    and replase it with following 2 lines:
        pagePushMessageTextAgent : 'Agent sent the following link: ',
        pagePushMessageTextBot : '',
3.  Save changes and close the file

4.  Open a file webChat.js
5.  Find following lines in method notifyNewPagePushMessage:
        var systemMessage = chatConfig.pagePushMessageText.concat(url);
        webChat.writeResponse(dateMessage, chatConfig.writeResponseClassAgentDate);
    and replace them with following lines:
        var systemMessage;
        var chatMessageClass;
        var senderType = body.senderType.toLowerCase();
        if (senderType === "bot") {
            systemMessage = chatConfig.pagePushMessageTextBot.concat(url);
            chatMessageClass = chatConfig.writeResponseClassChatbot;
        } else {
            systemMessage = chatConfig.pagePushMessageTextAgent.concat(url);
            chatMessageClass = chatConfig.writeResponseClassAgentDate;
        }
        webChat.writeResponse(dateMessage, chatMessageClass);
6.  Save changes and close the file