What role does よかった play in this exchange?


It's from
[twitter](http://twitter.com/#!/itoi_shigesato/status/169661833395961856).

[code]

    hetusa: 福岡県筑後、羽犬塚から行方不明になっていた叔母(73才)が発見された、と知らせがありました。
    itoi_shigesato: よかった。
    hetusa: ありがとうございました
    
[/code]

My feeling is that it says something like 'just so'.

Also, it common to respond to よかった with gratitude?




`よかった` means that the speaker was glad that the lost person was found.

I'm not sure that `ありがとうございました` is a direct response to `よかった`, rather it's
expressing gratitude for the other person showing concern about the lost
person.




`よかった` means that the speaker was glad that the lost person was found.

I'm not sure that `ありがとうございました` is a direct response to `よかった`, rather it's
expressing gratitude for the other person showing concern about the lost
person.

