in my process, i want to call a Action task in the back ground when ever my bot calls,
i mean, when ever employee logins in the bot, ( with user id ) my action task call the by taking as input ( my user id) and get the my emp id. from this i can query my personal details
now i am struck with how to call action task in dialog task to view the result
Any requirement which can be achieved using action tasks can be achieved using dialog tasks as well. The additional benefit the dialog tasks provide the developer is that, he could configure the dialog to make invoke an other dialog during the dialog flow, take the needed context information and pass it on to the current dialog. Use the options invoke dialog or invoke intent while trying to build the dialog on bot builder to have you requirement honored.
Also, please refer to the below post and replies under it which should give a better understanding on transitioning to other tasks based on a developer criteria: