I want to speak to

I want to speak to Mr Sato please.

Je voudrais parler à Monsieur Sato, s’il vous plaît.

I want to speak to the manager.

Je veux parler au directeur.

Did you tell him I want to speak to him?

Lui as-tu dit que je voulais lui parler ?

— How I Ended This Summer (2010)

I want to speak to Tom alone.

Je veux parler à Tom seul.

Herr Günsche, I want to speak to the Führer.

Monsieur Günsche, je veux parler au Führer.

— Downfall (2004)

I want to speak to my lawyer.

Je veux parler à mon avocat.

— Mirage (2018)

I want to speak to my lawyer now.

Je veux parler à mon avocat maintenant.

I want to speak to your manager.

Je souhaite parler à votre responsable.

I want to speak to him.

Je veux lui parler.

I want to speak to the person in charge.

Je veux parler au responsable.