Here are some examples:
* "He chatted up the girl at the bar for an hour, but she wasn't interested."
* "She's really good at chatting people up, she can make anyone feel comfortable."
* "He was chatting up the new intern all day."
It's important to note that "chatted up" can sometimes have a negative connotation, implying that someone is being overly friendly or even manipulative in their approach.
Let me know if you have any other questions!