Which of these customer service representatives is using a verbal filler?

Multiple choice question.

Mila said, "I will call you back no later than $3$:$00$ p$.$m$."$

Andrei backed up when he spoke so he wasn't invading the customer's personal space.

Tomas waved at the next person in line to approach the counter.

Lila said, "I will get back to you, er$,$ I mean they will call you back, uh$,$ as soon as they, you know, have the answer."