I can agree with Killzie. I only want to extend it as you don't always have the opportunity to bounce. One thing I usually do is to be their friends on facebook (thats a comfortable thing to do) with a little thing or frame set on the first conversation. After she accepted your friend request you can refer to the thing or frame. (eg: you can invent a nickname for her and on facebook you can open like hey <nickname>). This is a thing she will remember immediately so she will likely to respond. (I messed this one out for long time before I figured it out) After the respond you can build a little comfort then you can start escalating the conversation to sexual.
Tips: a good way to do that is a question game. She ask one question you answer and then you turn. The rule to set in the beginning is to be honest. By doing that you can ask about her first love, first kiss and turn the topic to harder ones like her favorite sex pose etc. Another thing you could do after that is sex cold reading. It sets the frame that you are the "inner guy"
In my experience if the sexual frame is set and accepted then you could easily go for day 2. (I pull here phone number that point -after fixing day 2- "to be able to call each other if anything happens")
Good luck