‘This is the future of our company,’ chief digital officer on delivery robot deployment in Houston

Former Tropical Smoothie Café and Arby’s executive Lisa Dimson joins the team

But brand warns it's running out of supply

Chris Cheek previously held positions at Newk's Eatery, Freebirds, and Le Duff America

Digital sales also rose 87.9% for the chain

The brand is struggling to keep up with pressure from competitors on delivery, technology fronts