Create a bot using Bot Framework Composer and that I integrate with qnA Maker works without any problem, but when integrating it into my website every time I update the page, or perform certain actions, the bot runs the greeting again, how can I validate that my Bot only say hello once, and when refresh the page or perform other options only show me the conversation history without saying hello again?

Web chat- Javascript

 <script>
 
            var ctoken ='xxxxxx';
            var cconversationId ='xxxxx';
            window.WebChat.renderWebChat({
                directLine: window.WebChat.createDirectLine({
                    token: ctoken,
                    conversationId : cconversationId, 
                    watermark: 10
                }),
            styleOptions: {
                hideUploadButton: true
            }
            }, document.getElementById('webchat'));
            document.querySelector('#webchat>*').focus();
</script>