Task: I had planned to stay in London city for a couple of days , Search for hotel in London city to stay from 21 october to 25 October for 2 Adults in the Airbnb app 
Steps:
Open the Airbnb app
Click on the Rooms category
Go to the search bar at the top of the screen
Click on the destination search bar
Type London in the search bar
Select the first suggested result
Set the starting date to be 21 October
Set the End date to be 25 October
Click on the Next button at the bottom right corner of the screen
Click on the plus icon next to Adult for two times
Click on the plus icon next to Adult for two times
Click on the search bar at the bottom right corner of the screen
Swipe up to view the results