Here's a refined version that maintains American colloquial style while keeping the emotional tension:

My chest tightened. "What time tomorrow?" I asked.

"Not sure yet. Keep your phone handy," Ashton paused. "Have you eaten?"

"Yeah, with Logan," I kept it casual, no hidden meaning.

Why would he think anything of it? He's the one who put Logan in charge. Sure enough, Ashton moved right along. "What did Logan say about ...