Opening a door with a text input

I’m using Unreal Engine 4 to make a small game of exploring a house and picking up notes.
For the final part of the game I want the player to come to the final door and be prompted by text saying “Where are you?” and an input to type “HOME” but I’m not really sure how to do it.
I have the rest of the game ready, just need that final part.

Any help would be appreciated.
Thank