If I had to give a singular piece of advice, I would suggest contacting large enterprises that still book hotel rooms, find the person who has the most control over bookings, and ask them, as it relates to the pandemic, if there’s service they feel is missing. B2B business has a much longer time to revenue, but the revenue is much more predictable. This would also solve the issue of Google, since they’re focusing to my knowledge on consumer market.
Lastly, this is a very regulated industries, I would suggest getting off the record advice from attorneys on potential legal issues based on any model you do find a product market fit for.