I had a babysitter booked for this weekend due to having some concert tickets. I asked her to confirm with me that she was still coming, but I have heard nothing from her. I have tried calling for the last two days and no answer. How long do I have to leave it until I try and arrange a new babysitter? If she doesn't show up, I'd need to miss out on the show, there is no last minute babysitting option. I have no other babysitters on call, so I would need to try and book through an agency, so I can't leave it much longer.