I want to some modification in Calls According to customer requirement.

I want to some modification in Calls According to customer requirement.

I want create new section in Call form and also want to create same field in with the same in two different section. 
For example:-
I have to create Call_End_time in Calls from in reason for outgoing calls section and also create reason for incoming section but right it is created with the different filed name. I want this same name in two different section.