in softWare engineering please draw uml activity diagram and give me result picture based on the senario: Normal:

A patient securely logs in with their username and password, gaining access to a user$-$friendly interface tailored for a smooth healthcare experience. Upon entering their account, a comprehensive set of options is presented, including appointment booking, communication with healthcare professionals, and the ability to send feedback. When the patient selects the "Book Appointments" option, a list of available appointments, along with the names of supervising doctors, is displayed, providing a clear and user$-$friendly interface for scheduling.

Alternative:

For a more focused approach, the patient logs in and immediately accesses the appointment booking feature. This alternative method streamlines the process by eliminating the initial menu options. Once the patient selects "Book Appointments," the system efficiently displays available time slots alongside the names of supervising doctors. In case of any changes to the appointment date, the patient receives timely notifications one day prior, allowing for convenient rescheduling.

Error Handling and Communication Improvement:

In the rare event of technical issues, the system ensures effective error handling. Instead of displaying a generic technical problem message, specific details about the issue are provided, helping the patient understand the nature of the problem. Moreover, the system is enhanced to promptly inform patients of any changes to their appointments, avoiding potential misunderstandings and promoting transparency in the scheduling process.

Rescheduling Flexibility:

In scenarios where rescheduling is necessary, the system supports a straightforward process. Patients encountering a need for a different appointment date can navigate the system without encountering errors. The user interface is designed to be responsive and user$-$friendly, allowing patients to select a new appointment date without complications, thereby ensuring a smooth and flexible experience.