Tone is essential to Ms. Golden’s — and her clients’ — success. She learns to imitate their conversational styles through the use of an eight-page intake form that includes specific questions: How do you take your coffee? Have you ever “swam with dolphins or stingrays or enormous turtles”?

By the time a potential client has answered those questions and had an hourlong introductory conversation, Ms. Golden thinks she can mimic them convincingly enough — down to whether they would type “gonna” or “going to” — to start chatting.

Ms. Golden, who has been covered by The Cut and CNBC, upholds certain rules for all of her clients. She subscribes to a less-is-more mind-set, and much of the work she does is in how little she says. She will not get caught in volleys of conversation, and judges prospective dates who do so.

“They should be wondering more about me, and I’m not going to give it all to them right then and there,” she said. “When I’m messaging someone and they respond right away I’m like, chill out, eager beaver.”

Outside of the $2,000 package (“the whole shebang”) she offers other services: a dating diagnosis (analysis and coaching) for $600 and her “perfect profile” service for $300. She is amazed at how often her clients come to her with a lineup of pictures that look like mug shots, or in which they are standing with three friends and are thus impossible to identify.

Ms. Golden picks the best of what they have to offer (clear portraits in which they are distinct and seem happy) or, in some cases, sends them to professional photographers.