[There is a screen popping up in reply, with an older boy's face on it. He has a faint New York accent, and there's a gap from some missing teeth, but the grin is friendly.]

Hey. First--you're not alone. How old are you, kid?

[The grin widens a bit, with a faint chuckle.]

Guessing you probably also were taught not to talk to strangers, which normally is very smart--but in this case, make an exception. My name's Casey, if it helps. Can you hold up your screen so I can see around you, as well?

[Because that'll help narrow it down. Some. Hopefully.]