Greetings and Leave-Takings

The first communication skill we will cover during this course has to do with greetings and leave-takings. Greetings are the expressions and gestures we use to say "hello." On the other hand, leave-takings are the expressions and gestures used to say "good-bye."
Common Expressions to Greet

• Hi / Hello
• Good morning / afternoon / evening
• How are you? / How are you doing? / How do you do?
• How is it going?
• I'm doing well. Thank you.
• I'm fine. Thanks.
• Not bad. Thank you. 
• I'm OK. Thanks for asking.

Common Expressions to Take a Leave

• Good-bye / Bye-bye / Bye
• Good night
• See you later / tomorrow / next week / soon
• So long
• Have a nice day / week 
• Nice to see you / Nice talking to you
• Take care

The best idea is to vary the expressions you use according to the situation and the frequency so that you sound natural and not like a textbook-repeating robot.