From the Toolbox
Go to the Request tab on your toolbox, there you will see a small alert and a sound notification if you are logged in. Click on the request triangle, then "Accept and Book to Personnel" and choose type.
Set the hours to all day or to the person working hours, e.g. 9.00 - 17.00 if 8 hours working day.
If users create a lot of Requests it is also possible to go an accept them all in one go. Go to the Requests tab of the Toolbox and open the menu of the top left corner.
From the Long Form and the Personnel Tree
Click on the triangle of the red box request and choose from the menu as above. If it's a multiple day request farmerswife will ask if you would like to accept the other days as well.