Task: I want to search for a flight to Oxford, United Kingdom from Rotterdam for a vacation on the Omio app for the 13th of December. 
Steps:
Open the Omio app.
Click on the Departure location option.
Enter Rotterdam in the text box.
Click on the first suggestion.
Click on the arrival city option.
Enter Oxford in the text box.
Click on the first suggestion.
Click on the Search Omio button.
Click on the Search Omio button.