Not willing to go the extra mile

I asked the lady to check for me on the system where I could find a size for a dress that I wanted and she went away for about 20 minutes. When she came back she said there is a size in Boulders Mall but it shows only one. I asked her to call Boulders if they do have so they can put it aside for me and she said she doesn't know their number. I asked if they don't have it on their system and she said no they only have numbers of stores that are in the same Region. <br> My question is, is it possible not to have contacts of your other branches? What is a customer supposed to do when even the store consultant doesn't know or have the numbers? Was I supposed to google for her in order to get them?