Lost e-ticket with barcode for a concert near the park and box office in Kirksville.

I lost a ticket for a concert that was supposed to take place this Saturday in Kirksville. I think I dropped it while walking near the park after picking it up from the box office. It's an e-ticket, so it has a barcode and all the details for entry. I'm really hoping to find it as I've been looking forward to this event for a long time!