how do I get red cap

"In the 1920s, station attendants wore different color hats, depending on their jobs. “Red Caps” helped passengers with their luggage and “Green Caps” helped deliver messages for travelers. The practice doesn’t exist anymore at Grand Central Terminal, although Amtrak still has Red Cap baggage handlers at Penn Station across town."

There are no "red cap" at Grand Central for Metro-north Service. This service can only be found at Penn Station In The Amtrak waiting area