Response pre-fill

[sldsld]

OTRS v 3.1.1

I have been successful in creating response templates for our agents with

• To,
  Subject and
  Text

fields all pre-filled although I would also like to have the

• next ticket state and
  Time units(minutes)

also pre-filled.
I know this is possible with creation of a phone ticket through 'AgentTicketPhone.dtl' but how do we pre-fill upon our responses also?

Many Thanks