How to offer and ask for help

Francesc: A party was a great idea, Adam.
Adam: Yes thanks. I'm looking forward to it.
Francesc: Have we got everything?
Adam: Well, we've got enough food, but ther aren't many hamburguers.
Francesc: Shall I get some hamburguers or something? There's a shop near here.
Adam: Would you mind?
Francesc: No, that's fine.
Adam: Thanks, Francesc. Could you get a something to drink too? And we need a bag for the rubbish.
Francesc: OK. NO problem. I'll see what they've got!