Power Apps Galleries- Show all events/Time slots for the person (Person Column Sharepoint) then filter by combobox date

So if the user doesn't select a date I have in the combobox, the gallery will display all the time slots Melinda has available.

 

Filter(TimeSlots,CounselorName.DisplayName = "Melinda", IsBlank(ComboBox2_1.Selected.DateDisplay) ||EventDate = ComboBox2_1.Selected.DateDisplay)

 

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