The coffee praiser

As always, we were chatting about / discussing about our every day work and current affairs around the world. Nothing strange.
There were a couple of co-workers there too who we usually came across with at this time everyday. Two women: a younger girl and a middle-aged woman. We just tossed them a cold hello everyday. We didn’t even know their names.
But this day, everything went differently.

When Ton was approaching to the coffee machine, one of them, the oldest one, loomed over him and said:

“Are you the one who was speaking?”

“Well, yes. It was me” Ton answered a little bit intrigued.

“You have a beautiful voice, son. You could work in the radio (or 'on the radio')”. She went like this (I'm not sure what this means), but pulling a stern face. Very serious.

After this thrilling statement, Ton's face was pure poetry. He could just launch ("return / muster / manage" would sound better here) a timid “thanks”. Unfortunately it wasn’t heard by the woman. She had already turned the other way and was walking back to the corner where the other girl was waiting.

We didn’t exchange any further words with them that morning.

Time has gone by, and still we still don't ever know either if she was either trying to flirting with Ton or if she just wanted to be keen. In any case, it s a very creepy way of starting a conversation with a semi-unknown (I would say that a person is either 'unknown' or 'known'.  You can't be semi-unknown.  Perhaps you could say 'a practical stranger / a mere acquaintance) person in an office. Please, first, speak of about the weather to open conversations.

The coffee praiser