DoubleTree by Hilton is teaming up with Amtrak to delight unsuspecting travelers by giving Chicago commuters a “sweet” surprise for National Chocolate Chip Cookie Day. On Thursday, August 4, DoubleTree by Hilton and Amtrak team members will give away the hotel brand’s signature chocolate chip and walnut cookies in Union Station, 225 S. Canal Street, to celebrate the annual holiday and inspire “Nice Travels.” Nice Travels is a multichannel movement led by Doubletree by Hilton that drives random acts of kindness to prove that “nice” is contagious. For information about the brand’s Nice Travels campaign, visit NiceTravels.com.