Even if Lectic sends you a new tube, it might be worth trying some tire sealant, like Slime, Stans, FlatOut, etc. On a new bike though, I'm guessing a spoke or a pinch flat, neither of which are best candidates for sealant.
I'd suggest removing the tube, finding and fixing the flat, and then, worst case, use it as a spare. But find out where the leak is and what caused it, if at all possible, and resolve that issue.
Tire sealant is a good long term idea, regardless.
TT