Here are some phrases and expressions for closing a conversation in English.
See also: Free-English-Study: Closing a Conversation
Before closing
It's been nice talking to you.
Nice talking to you too.
(I'm sorry, but) I have to go now.
Closing
Good-bye
Bye.
See you later.
See ya
(informal)
Catch you later
(informal)
For Conversation practice:
Situations: Closing a Conversation
Textbook: New Interchange Intro, Chapter 1
