Pull through URL and UTMS from landing page to VoiceFlow

Hi,

I'm running a chat on a Wordpress website and have a button that initiates the chat. I would like to pass the full url of the landing page as well as the UTM Parameters through to the Voiceflow chat and then through to variables within VoiceFlow.

Is that possible and how do I go about doing it? I've been through various AI chat sessions and it's not worked and support have suggested that I ask here.

Ideally I would like to push this via some custom javascript although perhaps we would need to use an API call.

Any help would be gratefully received.

Thanks,

Jon