Add "Please Wait" message between two activities


I was trying to check the feasibility to add “Please Wait” or some waiting message between two activities as i have a attended process and user has to wait a long time between two activities and its prone to fail.

So, just for him to clarify its a error or “Please Wait” for the activity to complete.

Can anybody help on this as in all the activities the bot is getting stuck and moving to the other activity or requires a manual interruption.