This feature can be available only when Admin configures it on Web UI.

To configure this feature, user needs to go to Call Center Set up - Disposition - Add Disposition

...

Feel Disposition name --- select sub-disposition type --- Select drop-down of validation-Enable the toggle button Assign Flow--- Select the flow from drop-down. (All flows configured for your account will be displayed in drop-down list).----Choose option of “Selected by Agent” for reschedule call.

In case you enable custom number, agent can manually fill the number in disposition form.
If Custom number is not enabled, agent can schedule call back only on the dialer number.

...

Definition

Reschedule Call is on call feature. It is used by agents to schedule a call back to customer in future. This feature is used at the time of filling disposition when agent is on call with customer.

Eg : - If agent is calling for gold loan and customer told the agent to contact next month. In such type of scenarios, agent fills all details in disposition form and schedules call with relevant date and time. PFB the screenshot for illustration :

...