No Fret. We've all been there.
It would be quickest if you'd check at the venues 'Lost & Found' first. Alternatively, you may hit us up on firstname.lastname@example.org with the following details:
1) Your booking ID
2) Time and location of the article being lost.
3) Details & descriptions of the article lost.
4) Additional details that would help to locate the lost item like, make, model, color, item description, etc.
Email us the details and let us see if it's been located with the venue.