Hi, I'm needing to catch a train - RER - early tomorrow morning from GARE DU NORD (close to my hotel) STATION to CHARLES DE GAULLE (CDG) Airport. Could someone please advise how and what ticket I should purchase at the ticket vending machine - if that's what I'm supposed to do. I just need a one-way. Is there anyone to help at the station who may speak English or...?

Any help would be appreciated!
Thanks so much