Most of the Korean amp providers are not from Seoul. They are from smaller cities such as Suwon, Incheon, Gwangju, Sokcho and others. So if a Korean customer speaks in a dialect from their city, that’s when the provider will freak out.
I never met a Korean amp provider whom I knew. But I met one room salon girl in Flushing who is friends with one of my former sugar babies in Seoul.