Basics:
* Γεια σας (Ya sas): Hello (formal)
* Γεια (Ya): Hi (informal)
* Καλημέρα (Kalimera): Good morning
* Καλησπέρα (Kalispera): Good evening/afternoon (used from noon until night)
* Καληνύχτα (Kaliníxta): Good night
* Ευχαριστώ (Efharistó): Thank you
* Παρακαλώ (Parakaló): Please / You're welcome
* Ναι (Ne): Yes
* Όχι (Ohi): No
* Συγγνώμη (Sygnómi): Excuse me / Sorry
* Δεν πειράζει (Den pirazi): You're welcome / It's okay / Don't worry about it.
Useful Phrases:
* Μιλάτε αγγλικά; (Milate anglika?): Do you speak English?
* Δεν μιλάω ελληνικά (Den miláo elliniká): I don't speak Greek.
* Ονομάζομαι... (Onomazome...): My name is...
* Πού είναι...; (Pou ine...?): Where is...? (e.g., Πού είναι η τουαλέτα; - Pou ine i toualeta? - Where is the toilet?)
* Πόσο κάνει; (Poso kani?): How much is it?
* Λογαριασμό, παρακαλώ (Logariasmo, parakaló): The bill, please.
* Έχετε...? (Echete...?): Do you have...? (e.g., Έχετε μενού; - Echete menu? - Do you have a menu?)
* Μια μπύρα, παρακαλώ (Mia bira, parakaló): A beer, please.
* Έναν καφέ, παρακαλώ (Enan kafe, parakaló): A coffee, please.
* Χάρηκα πολύ (Haríka polí): It was a pleasure (to meet you).
Important Note on Formal vs. Informal:
Greek has a distinct formal and informal register. The phrases above generally lean towards informal, but using "Γεια σας" (Ya sas) and being polite will always be appreciated, even if you're unsure of the situation. You will hear the informal "Ya" commonly used between friends and family, though.
To improve your pronunciation, I strongly suggest finding audio resources online – YouTube videos, language learning apps (like Duolingo, Memrise, Babbel), or online dictionaries with audio pronunciations are extremely helpful. Good luck!