I think it took about a week, but in the same week I contacted Tammy (Host) Wright Travel Agency, and she helped speed things along and get my date reserved.
A key component to working with your wedding coordinator once she is assigned, is to have one email stream, list your questions and let them answer before asking more.
It keeps their inbox and your inbox more organized and they are more likely to respond to you sooner, Usually about once a week until 1-2 months before you wedding then it increased to daily before you leave.
That was my experience at least.