Answer:
C2B - Consumer to Business Model
Explanation:
The above situation fits well with the consumer to business model. In this business model, the consumer sets his demand and what he can offer whereas the businesses decide if they are willing to work with those demands or not.
Max and Yvette put forth their price range and the airlines that are willing to sell on that price would be a catch for them.
This method was previously not so prevalent but it has caught speed in the recent past.