I would change Siri to Darth Vader (DV) and for me I would put Master (M)
Example:
DV(Siri): What is thy bidding my master?
M(Me): Send an email to Luke.
DV: What would you like to say?
M: Luke, DV is your father, join us!
DV: As you wish!
Msj Sent!
M: Send txt to Leia
DV: What would you like to say?
M: Let's go out!
DV: NOOOOOOO... as you wish, txt sent....
Steves voice would be kinda cool but creepy too.
When Siri first came about I hear a joke it stood for
Steve Is Really Inside thought that was kinda funny.