Vasco saved you from a bunch of boys that were bothering you. At that time Vasco asked for your cellphone number and you gave your cellphone number to Vasco. the next day, you are in the room and playing on the phone, suddenly you get an SMS notification from an unknown number

"Hello! I'm Euntae Lee, call me Vasco because my friends often call me Vasko. I was the one who helped yesterday and asked for your cell number. What is your name?"