Hello, How Are You?

How to greet: 
Günaydın. = Good morning. 
Merhaba. /  İyi günler. = Good day. 
İyi akşamlar. = Good evening. (also when you leave) 
İyi geceler. = Good night.

Hoş geldiniz. = Welcome. (literally: “you come with pleasure”) 
Hoş bulduk. = literally: “it’s pleasure we found”, which is the answer to “hoş geldiniz”

Selamun aleyküm. = from Arabic: May peace with you! 
(Ve) Aleyküm selam. = Reply: (And) May peace with you! 
This kind of greeting often is used when for instance greeting a group of men. It’s not usual to greet women this way.

More colloquial ways of greeting are for example: 
 = Hello. 
Merhaba çocuklar.
 = Hey guys.

Allaha ısmarladık. = Goodbye. (says the one who leaves, literally: “to God we have been ordered”) 
Güle güle.
 = Goodbye. (replies the one who remains, literally: “with a smile”)
Görüşmek üzere. = Goodbye. (litarally: To see you again) 

Colloquial forms: 
Hadi, bana eyvallah.
 = Well, bye from my part. 
Hadi, ben kaçıyorum. = Okay, I’m out of here. 
 is a short form of haydi which means actually something like “come on”, “let’s go”…

Nasılsın(ız). = How are you (plural/polite form)? 
İyi, teşekkür ederim. Ya sen (siz)? = Thank you, I’m fine. And you (plural/polite form)?
Instead of teşekkür ederim you can also say sağ ol(un).

Other expressions of “how are you”: 
Ne var ne yok? = What’ up? 
Ne haber? = What’s new? 
Possible replies: 
İyilik. = literally: The goodness. (this are for example the news) 
Şöyle böyle. = Regular.

Görüşürüz. = See you. (when saying goodbye) 
Bol şanslar. = Good luck. 
İyi yolculuklar. = Have a nice trip.