How can I ask for user input in Postman scripts?

I am using Postman 4.8.3, Chrome app.
I have used environment variables in most cases, but for a particular case I need user to provide input for each run (I am not running collection. Instead want to make the individual Postman call more interactive as I am dealing with some management APIs). I want to insert a code like: 

```
prompt("Enter resource id","#id");

```

in the Pre-request Script. 
However, when I do so, Postman ignores it and moves ahead.
Please help.