Bringing over rows of data based on drop down selection in different sheet

Hello, I have a spreadsheet with multiple sheets. On one page are the registration details for an event and on that page there is a column which asks if a voucher is required - options are Required or Not Required. On the second sheet I would like to fill the rows with the information of the rows in sheet one (name, phone number etc) where "Required" is selected and not bring over the info of the rows in sheet one where "Not Required" is selected.
I have been trying to get this to work for a week and to no avail.
If I haven't supplied enough info please let me know and I will try to respond with as much detail as possible.
Thanks in advance