Offer to help her search for one

"I'll help you search for one," you say.

"Hmm... Okay," Brenda says. "I'll be waiting for you at Bradworth Museum. I'll be hiding in a mummy case in the Egyptian wing. Don't keep me waiting too long or I'll be very upset with you. Understand?"

"Of course," you say.

Brenda hangs up the line.