As long as the member is signed up for the app with an email that is added as a member of an Account and service levels were set up for the Account, the user will see the options to book with the Account Service levels for his company. If you offer retail service as well, the member will see both options, helping you to advertise this side of the business as well.
After they choose the Account service level (vehicle as they see it), they will then be able to book as normal, go through the full experience of watching their driver on the map.. and when the ride is over, they will be billed based on how thier company is set up on the dispatching center, whether it be to a singular company credit card, the user's personal credit card, or via invoice to the company.