How does an attendee or booth visitor buy products from the booth?

During the live days, the system acts as a funnel to channel visitors to the booth for live, one on one, communications using a video chat system similar to Zoom.  They system is called "Whereby.com" The visitor can select the person in the booth with whom he wishes to speak.  Like Skype, this conversation can be video, audio, or text only.   At this point, the vendor representative has to close the sale any way that is possible, including just taking the order, by phone if necessary, and entering it manually.  This is what vendors have been doing for months under the social distancing guidelines from their home offices. 

During the on-demand days, the chat function will allow sending a message to someone in your company who will follow up responses on the system.  Close the orders the same way. 

If the visitor wants to "self-serve" then put a link on the menu bar that goes to your on-line store.  Does your store have a "bot" that monitors on-line shopper for abandoning the shopping cart?