がほしいのですが

I would like

→ が
phrase Rare #33,347
I would like A polite, indirect way to say what you want, often when making a request. The ending のですが softens the statement and leaves room for the listener to respond.
JA: メニューがほしいのですが。
EN: I would like a menu.

市内地図がほしいのですが

I'd like a map of the city, please.

チーズがほしいのですが

I’d like some cheese, please.

携帯電話がほしいのですが支払うのに十分なお金がありません

I want a mobile phone, but I don't have enough money to pay for it.

何か飲み物がほしいのですが

I'd like something to drink.

領収書がほしいのですが

I’d like a receipt, please.