First of all, most ladies pay for advertising a month at a time. Just because their ad is up, doesn't mean they're available. Secondly, many ladies use these forums to vet new clients. You have only 3 posts, which will ward off most reputable providers. Thirdly, most reputable providers I've talked to will not respond to one line texts like "hi" or "are you available". Introduce yourself and tell her a little about yourself and be polite and respectful. If she asks for certain requirements when you contact her, then provide that information. If you prefer to use a texting app, that will limit your chances.