The company has seen shares rebound in recent weeks as hopes for summer holiday travel overseas rise.
Last month the firm's chief executive Simon Cooper stressed the company had strong cash reserves and sees the current crisis as an opportunity to build its brand and relationship with hotels in popular beach holiday resorts.
Greening also runs The Social Mobility Pledge - a drive to make workplaces in London and around the country more diverse, and open up chances for disadvantaged young people. It has signed up hundreds of businesses to date.