Unless you could follow her in that day then if you go back there'd be even less chance of seeing her i.e. not working that day.
I once saw a Thai bird with a big pair buying some fags, then after she was stood outside the Thai shop smoking them and checking her phone. Then she went inside.
I followed her in and by that point she was eating something on the sofa, I asked if she was free and the receptionist nodded and took my cash. About 30 mins after seeing her big pair I was coating them with jizz
If the receptionist had said no I would have left.