"I'd be delighted to," Aziraphale replies graciously. "Crowley is expecting me to be gone for the entire day, anyway." He's probably misting his plants at this very moment, bebop blasting from the stereo at full volume. The mental image makes the angel smile to himself.

It's very thoughtful of Lucifer to set aside the day for the sake of Aziraphale's company, but without some sort of outside assistance, the angel isn't sure how they'll ever come to a decision.

"Well, er, we can start heading down one of the rows, and if I spot an employee, I'll flag them down?" That seems like a good enough compromise between their shopping styles.