Two methods instead of boolean parameter

two_methods_instead_of_boolean.rb

# calling code:
age = user.belongs_to_system_a? ? 
  find_age_from_system_a(name: user.name) : 
  find_age_from_system_b(name: user.name)

# methods

def find_age_from_system_a(name:)
  payload = build_payload(name)
  response = call_system_a(payload)
  parse(response)
end

def find_age_from_system_b(name:)
  payload = build_payload(name)
  response = call_system_b(payload)
  parse(response)
end

private

def build_payload(name)
  ...
end

def parse(response)
  ...
end