"I've not done anything just yet." Not that Yuri minds a little thanks, but he comes from the land of unending food poverty and deeply-rooted chivalry. The thanks isn't yet earned and his sense of fairness runs strong... Unless he deems someone unworthy of the courtesy.

"Besides, I may learn something myself in the bargain. My homeland's quite behind others' realms... Anyhow, I'll be ready to play host at the appointed time."