@FabianAckeret according to my excel here i have start and endtime column

and then in my gallery at power apps i want to set 1:00 PM and 2:00 PM is "booked" because 3:00 PM is endtime so another user can book it, im using this formula
if use this formula
LookUp(Table2,Ruangan = Dropdown1.Selected.Ruangan And Text(Date1,"[$-en-US]yyyyddmm") = Text(Today(),"[$-en-US]yyyymmdd") And Text(DateAdd(Start,TimeZoneOffset(Start),Minutes),DateTimeFormat.ShortTime) = Label1.Text ,"booked")
it will set 1:00 PM as booked but if modified the formula to add condition to get 2:00 PM with this formula below
LookUp(Table2,Ruangan = Dropdown1.Selected.Ruangan And Text(Date1,"[$-en-US]yyyyddmm") = Text(Today(),"[$-en-US]yyyymmdd") And Text(DateAdd(Endtime,TimeZoneOffset(Endtime) -60,Minutes),DateTimeFormat.ShortTime) = Label1.Text And Text(DateAdd(Start,TimeZoneOffset(Start),Minutes),DateTimeFormat.ShortTime) ,"booked")
it returns nothing

how should i do ?