Social Engineering call $(3)$

Call to main switch board of organisation.

Nathan: Hi$,$ I$\text{'}$m calling from Agency Group and I wonder if you could help me$.$ I had a meeting about a month ago with some of your HR people but unfortunately, my computer crashed and I have totally lost their names.

Reception: Sure, no problem. Let me look up that department. Have you any idea at all of their names?

Nathan: I know that one of them was the head of HR$.$ There was a number of people in the meeting though.

Reception: $q,$ OK$,$ here we are. Head of HR is Mary Killmister. $0207$ xxxxxxx

Nathan: Yes, that rings a bell. Who are the other names in HR$?$

Reception: In HR$,$ Jane Ross, Emma Jones......

Nathan: Yes, definitely Jane and Emma. Could I have their numbers please?

Reception: Sure. Jane Ross is xxxxxx and Emma Jones is xxxxxx$.$ Would you like me to put you through to any of them?

Nathan: Yes. Could you put me through to Emma please?

I now know the names of the three people in HR$,$ including the head.