Have you came to an agreement with her regarding the 15mins booking? Have you had an exact time and date accepted by both of you or has she gone silent even before you could have sorted the details?
Are you thinking that there's no agreed booking thicky?
No review is permissable without an agreed punt is it.
Having said that, the op did say she agreed to Saturday

so, I'm guessing that makes the review a goer.
Op could do with coming back on and offering some clarity imo.