OCL/UML

We want to carry out the sequence diagram of the following scenario: a customer addresses a salesperson in order to ask him to create a new order for him. Once the order has been created, the seller adds a new bouquet to the order, triggering creating a new bouquet in the system. To this bouquet are added the flowers F1, F2, and F3; in all three cases, the flowers are then marked as used. Later, the same seller makes the bouquet which will then be delivered to the customer. The customer, Using the seller's tablet, validates the delivery, which then closes the order. To help you achieve the scenario sequence diagram, here are the lifelines present from the departure: an employee actor, a client actor, an F1 flower, an F2 flower, an F3 flower. During of the diagram, an Order lifeline and a Bouquet lifeline will be created.