Will a potential sitter contact me before I book them?

I live in Montana, but will be visiting in Chicago area with my small dog, so I need a sitter for during the day in the Chicago area. This is just for during one day and possibly early evening, not for overnight. I've sent a message to 3 potential sitters. Do I now wait for one of them to respond? Most of them seem to have a nightly charge, but I just want someone for several hours during the day. Thanks.