List the name of the pilots who have flied for both a company that mainly provide 'Cargo' services and a company that runs 'Catering services' activities.
select t2.pilot from operate_company as t1 join flight as t2 on t1.id = t2.company_id where t1.principal_activities = 'Cargo' intersect select t2.pilot from operate_company as t1 join flight as t2 on t1.id = t2.company_id where t1.principal_activities = 'Catering services'