What Do You Write In A Sympathy Card What Is A Good Thing To Write In A Sympathy Card For Someone You Hardly Knew?

What is a good thing to write in a sympathy card for someone you hardly knew? - what do you write in a sympathy card

I am working at my current job for a month and my bosses father died. The staff has a card of sympathy for them and it is my time to write something, but I have no idea what to put down.