On the main screen there is
A button that can be clicked leads the user to a new screen for making an appointment to select a suitable day and time suitable for the user

On the screen for setting an existing appointment
Choose a suitable day in the current two weeks
and choosing an appropriate time according to the barber's working hours and choosing a time on the chosen date

After that, a button appears to make an appointment. If the user is not registered in the system, he will be moved to the next screen, but if he is registered, an appointment will be made for him immediately after clicking

When the user is not registered in the system, a who are you screen will appear where you can type in your full name and phone number and date of birth
Two buttons down that say
The first appointment appointment button includes registration in the system
Second appointment button without registration in the system