The quickest and easiest (spelling counts)
Hola
Here you got
Aquí tiene
the menu
la carta
Water ( no need to say "por favor')
agua
please (spelling may count)
por favor
In the morning
buenos días
The check (or the bill)
La cuenta
the food
la comida
juice
jugo
thank you
gracias
In the afternoon
buenas tardes
20 dollars
veinte dólares
bread
el pan
Apple juice
jugo de manzana
you're welcome
de nada
You should not drink coffee at this time of the day
buenas noches
What do you want (if they know you)?
¿Qué quieres?
A cookie!
Una galleta or la galleta
Orange juice
jugo de naranja
Excuse me
Perdón
See you later, but no alligator
hasta luego
What do you want (more formal; they don't know you)?
¿Qué quiere?
Healthier perhaps? Fruit!
fruta or la fruta
iced tea
té helado
With pleasure
con mucho gusto