[He's more going for politeness, than formality--but he'll try to remember. Once facing her again, he sighs, and still looks serious.]

No, it was my pleasure honestly. If I'd realized sooner, I'd have helped search more. He was a good friend, and we both arrived at the same time. I know he took his duties as a shinki seriously, so I wanted to help.

[Says the other person who takes his shinki duties seriously.]