Subject + 聊 + (Topic)
The verb 聊 (liáo) means "to chat" and is used for casual, informal conversation. It often appears in its reduplicated form 聊聊 to suggest a brief or relaxed chat. You can use 聊 with a topic or simply on its own to invite someone to talk.
我们找个咖啡馆坐下来聊聊吧。
wǒmen zhǎo gè kāfēiguǎn zuò xiàlái liáo liáo ba.
Let's find a café, sit down, and have a chat.
昨天晚上我跟老同学聊了好久。
zuótiān wǎnshang wǒ gēn lǎo tóngxué liáo le hǎo jiǔ.
Last night I chatted with an old classmate for a long time.
你有空的话,我们聊一聊这个项目的事。
nǐ yǒu kòng de huà, wǒmen liáo yī liáo zhège xiàngmù de shì.
If you have time, let's talk about this project.