I disagree. That is okay. However when such kind courtesies are rewarded this is good.
These small courtesies are often not rewarded. I myself have done such with no reward and expected none. An old couple on the side of the road with a flat tire. They were incapable of changing it. The were in their 80s. I saw their problem and stopped and changed their tire for them. They thanked me. I felt good all day. I expected nothing and received nothing. It was a good day for me.
God bless you for your act of kindness.
And that, FRiend, was a priceless reward.
(imho :)