Today i was called out for asking a waitress questions, according to her i do it alot and she asked me if i could not try and speak to her as she is too busy with other customers or the coffee machine is too loud etc etc. I wanted to check if it was my food on the table as there were a few different people around the same table. When i tried to explain she accused me of shouting at her. This put me off my food and i left it, she came over and took my plate before i had chance to process what had just happened. I don't have the option to avoid her in future because the cafe is within the place i volunteer at. Any suggestions how i can resolve this issue?