Good Day

We sometimes are facing the problem that someone, which is not already added as a requester, wants to create a ticket over the phone. In these cases the admin creates a user manually and afterwards the ticket can be created. The problem is, that regular technicians are unable to do this and therefore can not create the ticket right away. The best solution for us would be if technicians could also type in an e-mail-address during a ticket creation in the name field and the user gets added automatically similar to the cases when someone new writes an e-mail. Or is there any other way?