nagagalak ako na naka-usap kita. 話すことができてよかった。

Just so you know, the grammatically correct sentence is "Ikinagagalak kitang makausap." It is already implied in the word KITA that you're talking about you AND the person you're talking to. Examples: Mahal kita = Mahal KO IKAW. (Ikaw ay mahal ko.) Sinabihan na kita = Sinabi KO na sa'YO. Ikinagagalak kitang makilala = Ikanagagalak KOng makilala KA. I don't know why I keep seeing "(a)ko" used with "kita" around here but it's redundant. >.>

It depends on the context. "ikinagagalak kong makausap kita" can work for business, but this is quite formal. if you are talking to a friend that you are quite close to, a little informal, tag-lish reply will do like "nag-enjoy ako na kausap ka" or "ang sarap mong kausap". you can also thank them informally by saying "thanks for the chika", although this phrase (especially the word "chika") is sometimes associated with the gay sub-culture here, hehe :)

エルジンさん、ありがとうございます。　すごく嬉しいです！

こんばんは、 エルジンと申します。日本国籍ですが、フィリピン生まれ・育ちです。 何かフィリピンについて、質問などがあれば、ご遠慮なく、おっしゃってください。