This is an opportunity to highlight your time management and communication skills. You may also want to clarify if it is an option to leave the office and work on the task at home later in the evening or if the attorney would expect you to stay at the office.

"I understand that in a law firm, urgent tasks come up that need attention outside of typical work hours. If working past my normal hours for the day is not overtime billable, perhaps you could clarify the firm's policy on flexing hours. I would expect that in lieu of overtime, I would be able to come in later or leave early on another day during that pay period."