Is shooting a model so important? I mean fine you fix a date and she don't turn up unless you were at location and she responded via sms or something that she will be there on actual day a few hours before and don't reply or sms you again when you are there waiting telling you that oh she can't make it. Those who reply nonsensical stuff and those who don't reply i don't care. In fact sometimes after i send an email i just delete it from my sent folder. If she reply i will read. if she don't i don't give a care either.