Utilize the input text as a context reference, choose the right relationship between Airbnb and Business Travel from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

The company introduced a rudimentary system called Business Travel on Airbnb about a year ago, after it received requests for such a service-mostly from other tech companies whose staffers might not mind crashing on pull-out couches.

Answer: industry