1)
Is this not exactly what they already told him?
1.
Ibn Ezra citing Rav Sadya Gaon: The first time, they spoke in second person. Now they feared to do so; they spoke in the third person.
2.
Malbim: Before they thought that he remembered the dream, but did not want to tell it to them, Now they saw that he truly forgot it. They requested time ? perhaps he will remember the dream. You will tell your servants, and we will tell the Perush, and you will see that they match the dream.
