In a terminal program, input("Your name: ") pauses until someone types a response and returns it as a string. This browser editor has no interactive prompt: calling input() here could leave Run waiting, so the runnable example uses a prefilled string instead. A real terminal might use visitor = input("Your name: "); here the line visitor = "Noor" stands in for that response. Even numeric responses from input() are strings and need int() or float() before arithmetic.
The working program makes a reservation line from a prefilled response. Change only visitor to "Ivy". Edit main.py, press Run to see Seat for Ivy, then Submit. The final exercise will combine a prefilled response with conversion, arithmetic, and formatting.
"Ivy".