before u end a conversation with someone face to face or on a phone, u can use this phrase.
for example:
- 我们今天下午去购物,好吗? (let's go shopping this afternoon, OK?)
- 好,那下午见。(OK, see you this afternoon)
- 好了/好吧,就这样吧。(this phrase cant be translated exactly in english, it means "OK, bye")
好了/好吧 means OK
就这样吧 means that's a deal.
but in informal case, we dont say normally"that's a deal" so it should be "bye"