No worries.. my point is just that you asked her a very clear question - help me get good seats on this day. It is a no brainer that calling the restaurant is the thing to do if the online tools don't show anything. Why should you, or I, have to tell them how to do their jobs? What makes a good concierge is they take the inititative and aren't ordered around other than the initial request.
In my case I tried to explain that Amex had booked us in a penthouse suite at the hotel, so we'd likely be due some consideration for tickets, but she didn't want to hear it and didn't want to call them herself. Too much work.
I wrote to Amex to complain and got a generic 'we are so sorry letter'.