zannen desu ga, konya no kaigi ni ikemasen.

to be

Breakdown of zannen desu ga, konya no kaigi ni ikemasen.

• に: destination particle
• の: possessive case particle
• が: but

Questions & Answers about zannen desu ga, konya no kaigi ni ikemasen.

What does the particle が mean here after です?

Here が is a conjunction meaning “but/however,” linking a softening preface to the main statement. So 残念です (“It’s regrettable”) + が (“but…”) politely introduces the refusal that follows. It’s not the subject-marking が here.

Why is です used after 残念?

残念 is a na-adjective. When used predicatively, it needs the copula: plain form 残念だ, polite 残念です. Before a noun, it takes な (e.g., 残念な結果 “a regrettable result”). In this sentence the polite style matches 行けません.

What’s the difference between 残念ですが and 残念ながら?

Both mean “unfortunately,” but:

• 残念ですが、… literally “It’s regrettable, but …” and works as a softening lead-in to bad news in speech.
• 残念ながら、… is an adverbial “unfortunately,” a bit more neutral/statement-like and common in writing or announcements. Either is fine here.

Why is it 行けません and not 行きません?

行けません is the negative potential form: “cannot go” (unable due to circumstances). 行きません means “will not go” (a choice or decision). For schedule conflicts or inability, Japanese prefers the potential: 行けません.