Text back before you call, because your caller is underground for twenty minutes
A phone call is the wrong first move for a New York inquiry, because the person who just sent it is frequently somewhere they cannot answer.
The form gets sent on a platform, in a stairwell, at a desk with colleagues nearby, or from a small apartment where the other party is in the next room. Calling immediately means voicemail at best and an awkward moment at worst.
Send a short text or email within minutes that confirms a human has it, names the person who will call, and asks for a window when it is safe to talk. Then call in that window.
Speed still matters enormously. The firm that responds first is often the one that gets the consultation, because a person in the middle of this has usually contacted more than one office.
Make the acknowledgment neutral in tone and content. Something visible on a lock screen should not announce what the message is about.