Many game manuals suggest giving bonuses to skill rolls for persuasion if the player provides a particularly inspiring bit of roleplaying of the persuading speech.

You can choose to apply this even if the thing being persuaded is inanimate.

Transcript

Chewbacca: Come now my sweet, my flower, my chrome and steel petal. Turn now, swiftly and with joy. Beat as my heart beats for thee.
Chewbacca: 15.
GM: The engines pulse into life.
R2-D2: That's the sweetest dice-talk I've ever heard.
Chewbacca: I was talking to the ship.
{ship takes off}
[SFX]: whoooosh...
{Vader enters hangar}
Snow Trooper: Sorry, sir. They got away.
Darth Vader: I shall lead the pursuit. All ground personnel will remain here to man our new base. Congratulations.
Snow Trooper: Oh, thank you, sir. What shall we call it?
Darth Vader: "Orbital Bombardment Practice Range Omega."