Most convenient is shopinbit.com
Order your travel services via signal messages and pay over lightning.
Discussion
I’ve used them multiple times, can highly recommend!
That would go via their "Travel Concierge"? That sounds expensive.
It worked out cheaper for us than if we had booked it ourselves because they have access to commercial rates. You can tell them your budget. You can also use Travala, I’ve used them multiple times as well to book cheap flights and hotels, they accept lightning.