Answer:
Place an ad in the in-flight magazines of all the major airlines targeting business/first-classfliers.
Explanation:
As for the information provided,
Arizona Biltmore is a hotel and most of its potential conventional attendees will come from other states that means they will come from flights majorly.
Now, the best advertisement strategy or promotional strategy will ensure the maximum benefit to the hotel.
For this advertisement in flights is best as that in the flight itself will provide the potential attendees the information and awareness about the best stays for them.