[This message is sent to him very shortly after they send off their first message to Quark. They're still not very steady-sounding, but with a friend possibly in danger (for all they know), it can't wait.]

Do you know where Quark is? Um... [They're definitely really guilty.] All three of us got sick, and he must've gotten lost and we didn't see. I messaged him too but... I thought you might know.

[That's a good start, but... what if he doesn't know? They're worried.]

Um... do you know where Shelly Derrick's house is? That's where we were going. He might try to meet us there.