I Believe In The Power Of A Smile

I was there lining up for paying my stuffs in a store this afternoon. From a couple customers away, I could clearly tell the cashier look gloomy, probably due to the workloads. So when I paid, I spoke politely and smiled to her (I always do these two thing btw), then she started smiling all along. I was so glad that I kinda helped fix her day :)