"We are the technicians"

Yesterday we were using this study room in the library for more than 2 hours since nobody's coming to claim their turn.

Suddenly 2 guys came, standing right in front of the door looking at me.

Then I asked,

"did you guys booked this room?"

They looked puzzled and said,

"sorry? you have to book this room?"

"no, I mean did you booked this room?" I repeat.

They both were so blurred and then replied,

"oh no no, we are the technicians."

Oh ok... *embarrassed*