French phrase
Je vous appelle pour ~.
Meaning
I am calling to ___.
When to use it
States the purpose of a phone call. This formal wording suits official and professional calls.
Example dialogue
Je vous appelle pour confirmer notre rendez-vous.
I am calling to confirm our appointment.
Oui, c'est bien vendredi à 10 h.
Yes, that's right, Friday at 10 a.m.