Express doubt and persuade

William: Hey, Tis, what on earth is that?

Tis: Oh, I got this morning. What do you think? Do you like it?

William: Mmm. I'm not convinced.

Tis: Don't you think it's interesting?

William: Er, sort of, but I'm not sure about the face - it's a bit mad.

Tis: Oh, come on! It isn't that bad. It's really colorful. It's good to have a new picture, anyway.

William: I suppose so.

Tis: Don't worry, it'll be fine. It'll grow on you.

William: OK. We'll see.