Anakin and Padme talkng on the ship en route to Coruscant. In addition to Anakin giving Padme the famed necklace, it's also Heartwarming in Hindsight as despite their young ages and the five year age gap, the bond is strong with these two.
When Anakin goes to say goodbye to Padme on his way to the Jedi Temple. He pretty much asks Amidala to relay the message. This was before Padme was revealed to be the queen, it works in two ways of heartwarming; depending on who was in the role at the time. If it was Padme in the role, then she already got the message and just stealthly told Anakin that. On the other hand if it was Sabe in the role, she knows that Anakin is a friend of her boss and still would pass the message on.