expression
sorry to trouble you, but ...; excuse me, but ...
A polite, formal phrase used to preface a request, question, or apology. Often heard in business settings, customer service, and formal letters. The が at the end softens the statement and implies a following request or explanation.
恐れ入りますが、もう一度お名前をお聞かせいただけますか。
I'm sorry to trouble you, but could you tell me your name again?
恐れ入りますが、本日は定休日となっております。
I'm very sorry, but we are closed today.