Here is a literally-quoted passage from Martyrs in Paradise: Woman of Mass Destruction by Terry Reese Downing:
"How nice of you. And thank you," she again was appreciative.
"My pleasure. Go back to rest and sleep. Let me know if you needed something and don't hesitate to wake me up," he told her.
Is the use of past tense common in these kind of contexts? Does the use of past here get the point across in a less direct way?