French phrase
Quel est ~ pour vous contacter ?
Meaning
What is ___ to contact you?
When to use it
Asks for a suitable time to make contact. Polite and suitable for everyday use.
Example dialogue
Bonjour, Quel est le meilleur moment pour vous contacter ?
Hello, what is the best time to contact you?
Le matin, entre 9h et 11h.
In the morning, between 9 and 11 a.m.