Task: We made the choice to go to the Colosseum in Italy. Find a flight for three adults and one checked bag in the ecolony class from Orly to Fiumicino between October 20 and October 22 in the Kiwi.com app
Steps:
Open the Kiwi.com app
Click on the From section
Click on the close icon at the top right of the screen
Type Orly
Click on the first suggested result
Click on the Choose button 
Click on the to section
Click on the close icon at the top right of the screen
Type Fiumicino
Click on the Fiumicino airport suggested result
Click on the Choose button
Click on the departure section
Click on the 20 October
Click on the 22 October
Click on the Set date button at the bottom right of the screen
Click on the bag icon
Click on the plus icon next to Adults option in the Passengers section
Click on the plus icon next to Adults option in the Passengers section
Click on the plus icon next to Checked bags option in the Bags section
Click on the Save button at the bottom of the screen
Click on the Search button