How to book an activity but not auto asign to a technician?

Hi,

We have a requirement that Technician should be able to Create Activity from the current activity they are working on. We are using Book Activity for this purpose. But when a tech adds details and select a time slot and hit submit, the activity is auto assigned to a technician. Is it possible that we book the activity for a time slot, but do not auto-assign to a technician? OR even better, if we have an option to create a new activity (as non-scheduled) from within another.

P.S. This is my first post, so please let me know if I missed giving out any information.