Hand Modeling Job on Hold

I am on hold right now for a hand modeling job. The job is Monday. Being on hold means that the client has seen your photos, is interested, and wants you to hold the day because even though the job isn't 100% confirmed that you are booked, the client still wants to make sure you are available.

I just found out the way the manicure should look from my agency, so usually when I know this much, it means I am booked. Still until you get the 100% confirmed booked, you are still on hold and the job is not yours yet.