The prior posts imply that you cannot advance book which simply isn't true. If you are booking multi hours and have a particular girl in mind, advance bookings are doable. It does help if the agency knows you as a reliable client, which is a little bit different than favoritism.
I like that the agencies post when girls are fully booked. In the past, I did get an appointment with a girl that was fully booked. I booked another girl who was not fully booked but simultaneously asked to be put on the wait list of another girl at the same agency who was fully booked, knowing she would likely have a cancellation. She did have a cancellation, the cancelled time slot worked, then I cancelled the non fully booked girl and I saw the fully booked girl. It's simple- if you have some imagination and do not have a defeatist attitude, you do not get defeated. The attitude reflected in the prior posts results in defeat as soon as the poster looks at who is fully booked. Because of my plan and attitude, I was not defeated. It's the same here as in sports. You have imagination, or not. When Tom Brady staged the drive that won the Super Bowl, all he was thinking was, "how are we going to get the ball in the end zone?" He was not saying to himself, "shit, this fucker is over, I better pack it in and take a knee." Getting bookings with competitive, busy agencies works the same way. If you have a few imaginative plans one of them can possibly result in a touchdown drive., even with a girl who is fully booked. It's quite possible in 2017 to stage two plans like I have described above, with two different agencies, simultaneously, and execute one of them before the end of one day. All one needs is a fully charged smartphone, and an imagination. Having good smartphone typing skills also helps in these situations, where you are simultaneously texting multiple agencies about 3-4 girls.
It used to be around 10-12 years ago that agencies would post "on today" girls who were not working, or else had cancelled their shift for the day. There was one agency that was notorious for doing this. One day I called them and was told that a girl who was shown "on Today" had called in very early in the day that she would not be working. However they did not update their website or the MERB thread linking to their website, but instead kept bumping the thread with a link showing the girl was working when she was already known to have cancelled that day's shift. They kept doing this the rest of the day and into the evening. I posted about it because I felt it was very deceptive and misleading to the consumer. Frankly it also wasted their own Booker's time as he had to tell everyone who called she was not working. The agency did this to misleadingly create the impression that more girls were working than there actually were. In reality they had 1 or 2 girls who were actually on, whereas the website showed 4 or 5.
In 2017, we have some younger and tech savvy guys in the business and this type of business practice would never fly. The widespread development of the smartphone enhanced communications between agency and client. As a result, in 2017, with smartphones now being widely used, we have much better customer service and efficiency in bookings then we did in the pre-2010 or so era. All the top agencies now use text messaging as a booking method and it frankly enables one to execute imaginative plans with much greater ease. I cannot even remember the last booking I made via a telephone call, as opposed to text messaging. It's been years, I think.