Examples of verifying:
What you are looking for is the number of schools in Minnesota that offer tennis as an extra-curricular sport. Is that correct?
Am I correct that you are looking for an article about trout fishing in Alaska in the most recent issue of Field & Stream?
What you really need is a recipe for turkey stuffing that uses all gluten-free ingredients, right?
This last check insures that you and the patron understand what you will be searching for.