Utilize the input text as a context reference, choose the right relationship between Bharti Airtel and director 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.

"Our customers are the reason for us to be in business, we therefore constantly introduce innovative initiatives with a commitment to deliver a world class experience to them," Ajai Puri, director - Market Operations, Bharti Airtel (India & South Asia), said.

Answer: director_/_manager