json.extract! @conversations, :id, :subject, :created_at, :updated_at
json.is_read  @conversations.is_read?(@current_user)
json.messages @conversations.messages do |m|
  json.id m.id
  json.subject m.subject
  json.body m.body
  json.created_at m.created_at
  json.updated_at m.updated_at
end

json.recipients @conversations.recipients do |m|
  json.email m.email
end