Certainly! Below is a Mermaid syntax representation of the use case diagram for a parking payment application:

mermaid
%%{ init: { "theme": "default" } }%%
%%{ config: { "themeVariables": { "actorFill": "
                            
                            #f9f9f9
                        ", "actorStroke": "
                            
                            #333333
                        ", "useCaseFill": "
                            
                            #e0e0e0
                        ", "useCaseStroke": "
                            
                            #333333
                        " } } } }%%
graph TD
    A[User] -->|Registers| UC1[Register Account]
    A -->|Logs In| UC2[Login]
    A -->|Finds| UC3[Find Parking]
    A -->|Reserves| UC4[Reserve Parking]
    A -->|Makes| UC5[Make Payment]
    A -->|Extends| UC6[Extend Parking Time]
    A -->|Views| UC7[View Payment History]
    A -->|Receives| UC8[Receive Notifications]

    B[Parking Attendant] -->|Monitors| UC9[Monitor Parking]
    B -->|Receives| UC8[Receive Notifications]

    C[Payment Gateway] -->|Processes| UC5[Make Payment]

Follow-up Questions:

• Would you like to add any specific details or descriptions to the use cases in the diagram?
• Are there any design considerations or themes you would like to incorporate in this diagram?
• Do you need assistance with any other aspects of the parking payment application?