Hayden this week reiterated his desire to leave the club in this month’s transfer window to be with his infant daughter.
The midfielder told the Gazette: “It’s been difficult, but the club have known for six months what the situation is, and there have been a few conversations already.
“We’ll just see what happens over the next few weeks.
“As far as I’m concerned, I just get on with my job in training, and whenever I’m called upon, I try my best.”
Benitez – who blocked a summer move for Hayden – says he regularly speaks to the 23-year-old about his situation.
“I know what he thinks, because I was talking with him during the summer and now, but we will try do what we have to do – the best for the team and the best for everyone,” said United’s manager.
Hayden has started the club’s last three games with Ki Sung-yueng away with South Korea for the Asian Cup.
And the former England Under-21 international could start this evening’s FA Cup tie against Blackburn at St James’s Park.
“He’s training well, he’s working hard, he’s professional,” said Benitez. “He’s fine.”
Asked if there was a chance Hayden could leave this month, Benitez said: “He’s in the squad, so that is the main thing.”