I Emailed the Doula, Requesting a Partial Refund

A few days ago, I wrote about how the doula was really late for my appointment with the surgeon.  I emailed her today, requesting a partial refund.  I paid her $150 for her services, and since the appointment was about half over when she showed up, I asked for her to refund half of that money.  That seems more than fair to me; maybe I should have asked for a full refund.  I figured I am more likely to get half back, though.  We'll see.