My Japanese Is Not So Easy To Understand

On the bullet train to Tokyo I asked the beverage girl "コカコーラ わ あります か," (koka kora wa arimasu ka) which the phrasebook assures me means "Do you have Coke?"

"No, I'm sorry," she answers me in perfect English. "We only have hot coffee, apple juice, water and Coke."

I will keep trying.