"I might need the address, for the maps on my phone? What time should I meet you there? And maybe get at least one of your numbers? Just in case."

She figures that is probably the best way to figure it. To be safe in being able to contact them if she somehow gets lost or they need help. Not that they are aware of her being Ladybug yet, of course. But she could talk to Tikki about that later.

"And don't worry. I can handle a concert." She reassures the boy, thinking he was sweet for his concern all the same even as she glances and notes Amu turning.