No, it's not to much to ask. Regardless of what anyone thinks one is so busy they can't respond.  
The only reason I can think of is if you're looking for a last minute date and she clearly states that she is not available for last minute dates, she might just ignore you, but even then a simple response isn't to much to expect.

...someone would turn away potential new business. But it appears to be a common event, so dont take it personally. I assume that you are giving them a reasonable time to reply? Just press on with other providers and eventually you'll get a reply from a provider that actually cares about customer service. The ones who dont answer email aren't worth chasing IMO. Its their loss.

It sounds like you were looking for a same day date, and many ladies cannot arrange them on short notice.  Ignoring you, however, is wrong in my book.  You are correct: a quick reply telling you that she is not available is the professional thing to do.

  If you sent requests through P411, you might want to contact Gina, as I think (not sure) she has a policy about the time frame for replies.  I know she has has a four day policy when asking for an okay.  If a lady does not give an okay within four days, her account is supended.  I know this because I will be out of the country for three weeks in October, and I asked Gina about this.

   Life is too short: move on.

Hugs and Kisses,
Kelly

I like to arrange it as early as possible. The most recent example was 24 hrs notice ( she is in the top 100 nationally).  Gina told me to try 2 attempts and if  I hear nothing she will send a notice.

if you are writing to ask if she's available for 2 hours on Tuesday, July 22 at 4pm, then it should be a quick matter for her to check her calendar and respond. I certainly would respond quickly to that polite and concrete request!

If, however, you are requesting a "pre-screening", which indicates nothing but mere interest, not a real date... OR you are asking for her to tell you what times she has available, she may not want to elaborate on the slots in her schedule that are unfilled.

I've had gentlemen pose that question to me, under the guise of being flexible. Before I learned better, I would give them all the times I had open... from which they could deduce when I was busy, and how long I  
allowed between appointments. After a few time-wasters had me running ragged trying to find the "perfect time" for them, it became apparent that there was no such time.  

So... I believe I can state without dispute-- a specific time/date and duration will ALWAYS  elicit the most positive results!

Not sure how you are approaching the girls but 3 girls not replying seems excessive. Did you see that they all logged onto 411 during this time?  The latest one it sounds like she received your request;  viewed your profile and then was either pulled away from the computer or was running your info for screening. Gina tells us ( the providers) to use 411 as ONE source of screening.  Many of us will run your 411 info through other avenues. This takes time.  I agree they should send you a no ty if they are not interested though!  Where you are having trouble with 3 in one month you may want to actually ask gina. Something is off. I could see one here and there but 3 in 30 days?  Again this is assuming you see that each of them were logged onto 411 after your request.  I know the last one was (profile read) but the others.

per your responses to this post I see you did not wait to the last minute to book an appt.
I don't see why you did not get a response from any of the three ladies even if it was just to say sorry I am not available.That is just common courtesy..
If a gent contacts me via P411 requesting a date that I know I am unavailable I reply with a short response I am not available.That way the guy does not have to waste time trying to find out my availability he can move on to the next lady.Unfortunately,as you can see not every provider is like that.

But,also it goes for both sides of the coin.Gents if you sent a P411 appt request and a provider takes the time to look at your profile and respond back to you.At least give common courtesy if not interested or went with someone else to at least respond.I have guys send me P411 requests and I respond and never hear back from them.

...is that it is not like dealing with other businesses.
Standards for customer service in terms of replying to inquiries is vastly different.
Set the bar low and then you will not be disappointed - on the contrary, you will be pleasantly surprised and appreciative of those who reply quickly, courteously, and articulately (and if she demonstrates wit and charm, that puts her off the charts in my book!).

It is also not worth spending too much time trying to guess "why" you haven't gotten a timely reply from a lady.
Assuming you comport yourself well, both on dates and in communications, then the issue has nothing to do with you.
In these situations, I just move on - and with no ill will.  I may put in a follow-up request, or I may not.

I also would NOT report this to Gina, as personally I wouldn't want to "punish" a provider for this level of unprofessionalism.  The lady may be a little sloppy in this regard, but if she still shows up for those dates that she DOES schedule - and delivers - I think this is MUCH more important, so I'd hate to see someone removed from P411 just for not replying to all date requests.  Many of the ladies are just very young and with varying maturity levels, so you really shouldn't expect the standards of dealing with a fortune 500 company to apply.

Well, this is how I approach things anyway.
Most important words to learn in this hobby are "move on."
If you take care of your part, you will always have a fun time awaiting you soon - it might be a day later than hoped and with a different lady than you first hoped to see - but just learn to go with the flow, don't sweat the little things, and have fun.