Hello, Luis! Welcome to planDisney. We are so glad you're here!
I am so sorry to hear that you have a family emergency and have to cancel your plans for Disneyland After Dark: Sweethearts' Nite. First off, let me say that I hope everything is okay and that you have safe travels. If you are the ticketholder who made the purchase of these special event tickets with your Disney account, you can reach out to Guest Services by phone or through the Disneyland app chat to see if they can change the names on the tickets.
The Disneyland After Dark events are such a fun time to enjoy the parks with lower crowds with special entertainment, eats, and characters. Oh, and then there are the shorter wait times for attractions too! The "eats" part is always one of my favorites and the
Disney Eats Foodie Guide listing all the treats for the night is available on Disney Parks Blog. My biggest tip for these specialty treats is to plan ahead and mobile order whatever you want earlier in the day. Food lines get long and mobile order return times will go fast once the event starts.
Luis, thanks again for stopping by. I hope you are able to get this all sorted out.
Carrie