To make a good first impression, give a firm handshake, smile and say Merhaba!

Say Hello in Turkish

Merhaba means "hello".You can use it if you meet the person for the first time or on a formal meeting,or to someone you are familiar with. Another way of saying "hi" is selam but this
should be used on informal way only.

Literally: “May you be safe and
sound”.Also is used to express thankfulness to a person in a rather polite manner than simple thanks.

Teşekkür's origin is from Arabic and is one of the most frequently used words in both formal and informal ways.Çok teşekkür ederim means "Thank you very much." In a formal context, Teşekkürler! is enough.

The Orig. form of this sentence is Sen nasılsın? meaning How are you? However, Turkish tends to shorten it to sound more natural. In nasıl-s-ın -ın is the suffix for a sec.person singular so it carries the same meaning.