Ok, here is the dialogue for those scenes :
"Nephew, from this moment on, call yourself Vincent Corleone."
<Vincent kisses Michael's hand. Michael motions for him to sit down as Calo, Al Neri and Armand acknowledge their new Don.>
CALO (kissing Vincent's hand)
"Vincenzo."
VINCENT
"Grazie, Calo."
AL NERI (kissing Vincent's hand)
"Don Corleone."
ARMAND (kissing Vincent's hand)
"Don Vincenzo Corleone."
<Michael, watching, turns away and leaves with Connie, the door closes.>
Don Cardi