Girl messaged me online

A sister on the internet messaged me saying she reached out for ‘a matter’ but she would prefer if I discuss it with her Wali/brother

She didn’t make it explicit what but i’ve got a pretty good idea what it is

She has messaged me in the past about something completely different but those messages had no indication that this is what she was hinting at

I don’t know how to feel about a sister messaging me like this - is it cool/halal?