If you aren't familiar with chatbots, they're the latest and greatest thing being used at trade shows, conferences, and more. Essentially, the bots are virtual concierges. My girlfriend happens to be a concierge, but she's s no bot. I'm pretty sure that's a compliment.
Anyway, chatbots are increasing efficiency by answering common questions, as well as engaging event attendees.
BizBash has a great article on the topic titled 9 Tips For Using a Chatbot at Your Event.
Enjoy it and let me know in the comment section if you've used a virtual concierge at your event.