• If you are trying to schedule, I would send an email as well before throwing in the towel. Sometimes ladies aren't able to have a phone conversation.

• If you are scheduled, have reached the time to meet and you don't get a response, shame on her, I would move on.

 
My Sincere Opinion,
Sindie Symons

If you mean while trying to set up a date, whether to let her know when she can call you back, or to give her the heads up that you will be trying her again so that she can keep an eye out.  I get a lot of calls where they leave no message...I just figure its a wrong number and forget about it. May not be, but I dont know if theres no voicemail and Im not going to chance that or reaching a guy at a really bad time.

I stopped even listing a number for this very reason. Guys would call, and never leave a message saying shit, and I am not going to call someone back knowing they mght be with their family or at work. Calls are a pain in the ass, which is why more and more providers don't list a number, but will give one after they know a guy is legit and actually has a booking. I would say call no more than twice, but leave a message the first time. Wait a day, then call again. If you don't hear back, she's not interested or may not be working. Try email.