あなたがいらっしゃるので私たちはうれしい。

We are glad you are coming.

あなたがいらっしゃるので私(わたし)たちはうれしい。

Anata ga irassharu node watashitachi wa ureshii.

貴方 (あなた)

you (referring to someone of equal or lower status); dear (what a wife calls a husband)

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

いらっしゃる (いらっしゃる)

to come; to go; to be (somewhere); is (doing); are (doing)

ので (ので、んで)

that being the case; because of ...; the reason is ....; given that...

私たち (わたしたち、わたくしたち)

we; us

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

嬉しい (うれしい)

happy; glad; pleasant

Readings: シ、わたくし、わたし

Meanings: private, I, me