If you're just connecting the single monitor to the system, you don't need a dock that will likely cost you over $100 -- you can simply plug the monitor into the system, and if you need to charge multiple devices a $30 USB charger (example below) will do the job just fine.

https://www.newegg.com/black-ravpower-usb-desktop-charger/p/379-008A-00012?Description=RAVpower%20USB%20charger&cm_re=RAVpower_USB%20charger-_-9SIAP08EWT5812-_-Product&quicklink=true

I am looking to connect two monitors, first, Dell 27" S2719DC, and second, Dell 27" s2719nc. Sorry for the confusion!

That's a different story -- and while many docks you can buy will meet the power requirements, you also need to consider exactly what you will be running on the system and projecting to the external monitors.  This is a slim, light notebook with a low-power CPU -- you may wind up less than pleased with its performance if you try connecting it to two monitors.  It just is not intended for that workload.