Interactions:

• The User utilizes the Mobile App to send requests.
• The Mobile App communicates with the Back-End Services to process requests.
• The Back-End Services interact with the Database to perform data operations.
• The Back-End Services also call upon Third-Party APIs to fetch necessary data (e.g., flight info, maps).

Interactions:

• The Mobile App makes authentication requests to the Authentication Service.
• The Mobile App sends booking requests to the Booking Service to facilitate flight reservations.
• The Mobile App interacts with the Itinerary Service to create or update travel itineraries.
• Each service interacts with the Database to read and write relevant data, ensuring all user information and bookings are securely stored.