TV series example of the word

The Big Bang Theory Season 3, Episode 17
I spent two and a half hours on hold with Hewlett-Packard customer service...

The Big Bang Theory Season 3, Episode 17
...just to complain about their customer service.

The Big Bang Theory Season 3, Episode 4
Or as you may know him, Dave from AT&T Customer Service.

The Big Bang Theory Season 6, Episode 1
Yeah, you're my first customer today.

Game of Thrones Season 5, Episode 8
my first customer of the day, on her way home.