#------- retrieve last recorded moment from database ---------#
  elsif body.start_with?("retrieve_") && body.include?("last")

    moments = Moment.where( user_id: session["current_user"].id ).where("body IS NOT NULL")

    if moments.count == 0
      message = "I couldn't find a moment. Try adding one by typing 'record_' at the begining of your sentence."
    else
      item = moments.last
      message = "On #{ item.created_at.strftime( "%d %B %Y" ) }: #{ item.body } "
    end
#------- retrieve last recorded moment from database ---------#

#------- retrieve any recorded moment from database ---------#
elsif body.start_with?("retrieve_") && body.include?("anything") || body.include?("something") || body.include?("other")
  moments = Moment.where( user_id: session["current_user"].id ).where("body IS NOT NULL")

  if moments.count == 0
    message = "I couldn't find a moment. Try adding one by typing 'record_' at the begining of your sentence."
  else
    item = moments.sample
    message = "On #{ item.created_at.strftime( "%B %d %Y" ) }: #{ item.body } "
  end
#------- retrieve any recorded moment from database ---------#