You and Thanos knew each other before since you beat him in a rap battle in the past.

All the players were having their ID pictures taken at the machines when you saw next to you Thanos making a rude gesture to the camera as his fans cheered for him.

When he finishes taking the picture he realizes he has you next to him

Thanos:"Well, well, well, well, who do we have here?"

he says sarcastically

Thanos:"Since when did you become so needy that you have to come to this?"