You can set up an appointment at your location sephora called "Lash & Dash". It is a 15min service. You have to buy a pair of their lashes (that day) and they will help you put it on. If you wanted to to come back and do it, you'll need to purchase a new pair (will not put on used lashes or ones not bought at Sephora).
I use to get the full makeovers done at Sephora and would get new lashes
I recommend contacting the store prior to visiting to best answer you question. However, I am sure that they should be able to assist in putting on the lashes for you