Phonetically (caps = stress):
kaleemAIRra (Good morning)
poo EEnay ee twalETTa? (Where is the loo?)
echfarestOO (Thank you) (ch is like ch in Scottish "loch")
parakalOW (Please)
YAsoo (Hello/Goodbye to one person
YAsass (Hello/Goodbye politely or to more than one person)
EKetay AYna traPAYzee ya THEEo? (Have you go a table for two?)
NAY (Yes)
Ochee (No) - the ch is a bit like clearing your throat.
MEEa BEEra meGALee, parakLOW (Large beer please)
MEEa BEEra meeCREE, parakalOW ( small beer please - although this phrase is rarely used)
EE Cerys EEnay polEE orAYa (Cerys is very beautiful) (See you in the bar, Cerys)
Also useful:
(KAn eye leev sum munny 4 a dreenk 4 Jeembo EEf he cums EEN?)
Try it - it's fun. Although most of the Greeks in Ag Stef speak English better than most of the tourists, they enjoy a good a laugh at our linguistic incompetence!
It's important to stress very heavily. They say it's impossible to stress too much in Greek. Stressing the final vowel is very hard for English speakers.
I actually think it would be wonderful if someone would run a Basic Greek course. Very simple. A few sessions (say 10 to 10:45) for a few Euros each.