I did a reverse image search, it is not new, it's actually stolen from a facebook post 2 years ago, and has been reported by foxnews
http://fox43.com/2016/09/09/stranger-calms-fussy-baby-on-plane-so-pregnant-mom-can-rest/:
Yeah I am sure it's on YOUR flight u/julieeea .
If you look at the original description:
Can you imagine being a total overly NICE guy, walking the aisle comforting other people's baby making everybody look at him? Just appreciate him?
"Awww what a nice guy"
"IKR"
"I wish I had a man like that"
*Snaps pic*
Dude wtf.