Would you like some cake?

Yes, please.
 No, thank you
Sure. Thanks
I'd better not.
Okay. Thank you
No, but thanks for offering.
 

Would you like to go see a movie?

Okay. Sounds good.
No, I'd rather not.
Sure. I'd love to.
I'm sorry, but I can't.
Yeah. Good idea
No, but thanks for inviting me.

How about some more pie?

All right. Thanks
No, thanks.
Looks good. Thanks
I'm really full. Thanks anyway.
Don't mind if I do.
Looks delicious, but I'll have to pass.

How about going skiing this weekend?

Great. What time?
Sorry. I'm busy this weekend.
Sounds like fun.
I don't think I can.
All right. When and where?
How about some other time?