Why your receptionist should get sales training

Listen carefully to what the other person is saying.
Facilitate / assist / help / lead / guide this person by offering your knowledge, assistance, solution and in some cases simply your empathy.
Build relationships by being reliable, trustworthy, hardworking and ethical.
Always work toward a win-win solution.
Celebrate every success.

Heck, in my opinion, they should teach sales in junior school.