OP here, this is very embarrassing. This client was actually a very good friend of mine and I told her I would be back in a few moments. She understood completely I just informed her to place it at the cash. My coworker however did come along to ring her through placing the items under her name in the system. Which made me lose out on a $500 dollar sale. So far management has done nothing, but I think she does feel bad because she knew she was in the wrong. My mistake though for eating a big unhealthy breakfast that did not agree with my bowels. For future I take this into consideration.