I have tried both "Hello. If you have any questions, please let me know."
"Hello, My name is April and I have created everything in the booth. I am selling a nice variety of Silver or Copper Hoop Earrings, Wire Wrapped Stone Pendants, and Recycled Stained Glass Earrings (Which are Eco-friendly). If you have any questions, please feel free to ask."
I will be honest, I have had much better sales/conversations with the second scenario.
Which way has worked best for you, when you are selling your work?