Task: I used the Rail Planner apps to get a train from Southampton Central to Berlin on October 31 because I had to travel there for work. 
Steps:
Open Rail Planner app
Click on the from tab
Type Southampton Central in the from tab
Click on the suggestion
Click on the to tab
Type Berlin in the destination tab
Click on the suggestion
Click on the departure 
Click on the departure 
Click on the done button
Click on the plan my journey