Normally I contact a new lady I haven't seen at least 2 days before the day I'm wanting to schedule. If I don't hear back in about 1 day I'll move on to someone I have seen before. If she contacts me after I've moved on, no problem, I will just schedule with her for a later date. After two emails and no response I mark her off the list as "she's not interested". Same thing for ladies I've seen before.
Seems to me after two emails or phone calls you should hear something... if only "no thanks or I'm booked up" Does this sound too rigid? Hope I'm not missing out on some good times!