Finding a dwarf standing there, he was certainly towering, in Bilbo's point of view, at least. "Dwalin", he introduced himself with a hint of a Scottish accent before bowing to his new host. "At your service", he added before standing back to his full height and stepping inside. 

"Which way, laddie? Is it down here?", Dwalin asked, as if he was expected to be there. "He said there’d be food, and lots of it", he was entering the kitchen now, just before the doorbell rings again.