Oh Jay, it has been so long. I was sure I would never see you again.
Daisy, our fears are the same, however, I see you every night in my dreams.
*Reminiscing of good times*
*Nick walks in*
I sure did mi-
HEY old sport!
I believe that Gatsby and Daisy said these things based on Nick's assertion that "Daisy's face was smeared with tears, and when I came in she jumped up and began wiping at it with her hand-kerchief before a mirror". Additionally, based on "Her throat, full of aching, grieving beauty, told only of her unexpected joy" reader's can also conclude that Daisy had a very emotional conversation with Gatsby.