Michelle Obama revealed in her memoir "Becoming" that she offered Melania her assistance if she ever needed it but Melania has never contacted her. And the White House confirmed this by releasing a statement stating that Melania is capable and doesn't need Michelle's help.
Michelle told of how she extended the same courtesy to Melania Trump when she left office that her predecessor, Laura Bush, gave her. Michelle said to Melania that she was just "a phone call away" if she needed help, but Melania never reached out to Mrs Obama to take up the offer even in spite of her 8 years experience as first lady.
In an interview with ABC's Robin Roberts, Michelle Obama was asked if Melania has ever called to take up her offer and she replied: "No… No, she hasn’t."