Power Platform Community Forum Thread Details

Hello, I have tried to search for my answer before posting, but I'm not sure if I'm not wording my search correctly, as I haven't found any results. Could someone please assist me with setting up the following flow?

I have two lists. List A contains a name of all of my customers coming in today or tomorrow (plus additional info). List B contains the names of my customers who I do not want to return.

I am trying to build a flow that searches List A using the names on List B, then emails me when a match is found. Can you please help me put this together? I have tried unsucessfuly and get an error that it must be in an array.