The 26-year-old has been a subject of discussion since the Magpies' season ended in the first week of finals, given he is still yet to recommit to the club.
There has been speculation the Blues are preparing to table a lucrative offer, with other suitors expected to also try and lure the 2010 premiership star.
Coach Nathan Buckley said the two parties remained in conversation and he had spoken to Thomas as recently as last week.
While he didn't offer a definitive answer when asked if he was confident Thomas would remain a Pie, he said talks were still happening.
"We're continuing the conversations and making sure that we find out exactly where Daisy is at and what he needs to hear from us and we'll go from there," Buckley said on Monday night.
"We're in conversations and we just need to keep that going.
"I spoke to him before the weekend, I haven't seen him since then.
"Obviously since Carlton has gone out it becomes a bit of an issue but we've been having chats ongoing and it will continue."
