What are you going to do about your vacation?
I've been thinking that I'd like to go to Hokkaido, but . . . (I'm not certain).
Hokkaido? Are you going alone?
No. Uh, with (Mr.) Yamanaka and his (younger) sister, (being) three of us.
Oh, then it should be fun!

Oyasumi wa doo sun no?
Hokkaidoo e ikitai to omotte (i)ru n desu kedo..
Hokkaidoo? Hitori de iku no?
Ie. Anoo... Yamanaka-kun to Yamanaka-kun no imootosan to, san-nin de.
Aa, jaa, omoshiroi daroo ne!