I judge shopworkers by the same standards I judge anyone else.
In both examples, the person in question did not treat the client with the common courtesy you would expect anyone to show to someone else.
It has got nothing to do whether the employee has had training in interacting with customers, or even, more ridiculously, it was not her job to tell staff there was a customer awaiting service. As for carrying on a private conversation on the phone while doing your job, especially when that job requires you to interact with other people.
How many threads have their been on GN complaining about people being on thier phones all the time, when the individual have been dealing with customers, or clients etc etc?`
Basic good manners and courtesy to other people puts both these peope in the wrong.