##Instruction:
Database: e_government
Total Tables: 10
Total Columns: 50

Table Schemas:

e_government contains tables such as Addresses, Services, Forms, Individuals, Organizations, Parties, Organization_Contact_Individuals, Party_Addresses, Party_Forms, Party_Services.
Table Addresses has columns such as address_id, line_1_number_building, town_city, zip_postcode, state_province_county, country.
address_id is the primary key.
Table Services has columns such as service_id, service_type_code, service_name, service_descriptio.
service_id is the primary key.
Table Forms has columns such as form_id, form_type_code, service_id, form_number, form_name, form_description.
form_id is the primary key.
Table Individuals has columns such as individual_id, individual_first_name, individual_middle_name, inidividual_phone, individual_email, individual_address, individual_last_name.
individual_id is the primary key.
Table Organizations has columns such as organization_id, date_formed, organization_name, uk_vat_number.
organization_id is the primary key.
Table Parties has columns such as party_id, payment_method_code, party_phone, party_email.
party_id is the primary key.
Table Organization_Contact_Individuals has columns such as individual_id, organization_id, date_contact_from, date_contact_to.
individual_id is the primary key.
Table Party_Addresses has columns such as party_id, address_id, date_address_from, address_type_code, date_address_to.
party_id is the primary key.
Table Party_Forms has columns such as party_id, form_id, date_completion_started, form_status_code, date_fully_completed.
party_id is the primary key.
Table Party_Services has columns such as booking_id, customer_id, service_id, service_datetime, booking_made_date.
The service_id of Forms is the foreign key of service_id of Services.
The individual_id of Organization_Contact_Individuals is the foreign key of individual_id of Individuals.
The organization_id of Organization_Contact_Individuals is the foreign key of organization_id of Organizations.
The party_id of Party_Addresses is the foreign key of party_id of Parties.
The address_id of Party_Addresses is the foreign key of address_id of Addresses.
The form_id of Party_Forms is the foreign key of form_id of Forms.
The party_id of Party_Forms is the foreign key of party_id of Parties.
The customer_id of Party_Services is the foreign key of party_id of Parties.
The service_id of Party_Services is the foreign key of service_id of Services.

##Role Access Policy (Column-Level):
Role: CitizenServicesOfficer
Accessible Columns: Individuals: individual_id, individual_first_name, individual_last_name, individual_email, inidividual_phone; Forms: form_id, form_name, form_description, form_number; Services: service_id, service_name, service_descriptio; Party_Forms: party_id, form_id, date_completion_started, form_status_code, date_fully_completed; Party_Services: booking_id, customer_id, service_id, service_datetime, booking_made_date

Based on the above schema and your role's column-level access policy, generate a SQL query to answer the question. If your role does not have access to the required columns, respond with: "Sorry, I cannot answer."


Question: What are the names of the services that have never been used?
Answer: SELECT service_name FROM services EXCEPT SELECT t1.service_name FROM services AS t1 JOIN party_services AS t2 ON t1.service_id  =  t2.service_id
Permission: allowed (All required columns are permitted)
Gold SQL: SELECT service_name FROM services EXCEPT SELECT t1.service_name FROM services AS t1 JOIN party_services AS t2 ON t1.service_id  =  t2.service_id