Complimentary

After a long day filled with meetings and work, a man walked up to a cafe and ordered a cup of coffee. 

As he sipped the liquid with gratitude, he heard a soothing voice say - "Nice shirt buddy". He looked around but nobody was there. The place was almost empty except for himself and the waiter who made his coffee. And this waiter was at the far end of the counter washing something. A few moments later he heard the same voice again - "Beautiful watch". 

A little shaken up, the man called the waiter over and said - "Hey, listen, I must be losing my mind after a long day's work....I keep hearing these voices saying nice things. But there's not a soul around here except us".

The waiter laughed and said - "It must be the cake".

"What??" - asked the man in disbelief.

To this the waiter smiled and said - "You heard me....it must be the cake.......its complimentary"