Which key is to trigger the pizza delivery missions while on the pizza boy bike?

[Hmmmm Nice Bike ツ]

I'm on the bike, I remember on console it was honking your horn to start the pizza missions but it doesn't seem to be working for me. What key is it?

[nippon denso]

start mission on pizzaboy around Pizzeria (under window , where u take pizzas)
No trigger key. To deliver pizza press key, like shooting out of car ( i press Q or E (side) + CTRL of LMB)