English: Just a glass of water, please.
French: Juste un verre d'eau, SVP.
Un verre=a glass (a cup)
Un verre d'eau=A glass of water
Sometimes, passengers will ask for "some water"="de l'eau". Sometimes, they'll ask for "a glass of water"="un verre d'eau". Sometimes, they'll ask for "just a cup of water"="juste un verre d'eau".
Learn other flight attendant French phrases and much more with Canadian French for Flight Attendants. Special pre-launch trial price for Module 1.