How to utilize multiple ask the user filters in single query while allowing for situations with no input for some of the filters.

I seem to recall that I use this technique in the past.

I created a mirror Field for example a field called [customer name or enter * for all]

With the formula

[customer name] & "*"

So the result is ACME INC.*

Then I use that field for the Ask then User prompt and try to train the users to know that they put in an * for a wildcard.

But this tactic will only work for a contains search