If you're going to play our a pre-scripted scene as part of the roleplaying within a game, try and rehearse it to make the delivery natural.
At least once.
Han: Now that we're not in imminent danger of being blasted, there's something I want to ask you, Princess.
Leia: And what pray tell would that be, Han?
Han: I would be most honoured if you would accept my proposal to become co-pilots. Matrimonially, I mean.
Leia: Why, I should be most delighted.
R2-D2: What the hell was that?
C-3PO: Han and Princess just got engaged to be married, you dork!
Chewbacca: My compliments and felicitations on this convivial occasion.
R2-D2: Oh, nice. Is it worth XP?
Wicket: Let me be the first to offer you my planning and ceremonial services, at an exceptionally special price.
Leia: This was easier when you asked me in real life earlier today.
Han: We didn't have an audience then.