I'm going to ignore a specific customer.
What about this customer is bother you the most?
She's being so darn annoying, she keeps on whining and is a bad influence
It's rude to ignore a customer while you're working. But it's also rude for the customer to treat you that way.
I am going do what I can to help her last.
What if she just needed a quick question answered? I think that you should not ignore a customer when you are working, that is what you are getting paid for.