I attended the Neiman & Marcus/ Tricky Tray event ...

I attended the Neiman & Marcus/ Tricky Tray event last night. It was excellent. The food, drinks, staff and vendors were outstanding. Even the bathrooms were immaculate and well stocked. I did misplace my telephone charger @ the event and now unable to contact this facility to inquire about it. The Operator service isnt functioning & how can I inquire regarding lost/found articles? Otherwise, it was a grand time.