I am acquaintances with a Siri. She's seems like a nice person, but since she works in a service industry I bet she's tired of hearing "Hey, Siri" all the time. If I was her, I'd ask for permission to not wear a name tag.
Though it can get a little confused when I'm watching Star Trek variants on a nearby TV...
"Echo" is the 'safest' one for me.
If I were in a service job with a name tag I would definitely not use my real name.