undefined method `title' for nil:NilClass in ruby

While I am rendering page I got undefined method 'title' for nil:NilClass Here is my code:

routes.rb

get 'contact-us' => "pages#contact_form"
post 'contact-us' => "pages#contact_us"

pages_controller.rb

 #http://localhost:3000/contact-us
def contact_form 
    @page = Page.find_by_seo('contact-us')
    @inquiry = Inquiry.new
  end

  def contact_us
    @inquiry = Inquiry.new(inquiry_params)
    respond_to do |format|
      if @inquiry.save
        InquiryMailer.welcome_email(@inquiry).deliver
        format.html { redirect_to :back, success: 'Your request successfully sent.' }
        format.json { render '/contact-us', status: :created, location: @inquiry }
      else
        format.html { render :contact_form, notice: 'Please fill all the fields.' }
        format.json { render json: @inquiry.errors, status: :unprocessable_entity }
      end
    end
  end

contact_form.html.erb

<div class="contact_left">
    <ul class="contact-form_address">
      <li><%= @page.title %></li>
      <li><%= @page.description.html_safe %></li>
    </ul>
    <div class="map">
      <iframe src="http://ift.tt/1YhaWG4" width="100%" height="450" frameborder="0" style="border:0" allowfullscreen></iframe>
     </div>
</div>
<div class="contact_right">
   #Contact Form here...
</div

Please let me know how I am getting @page.title nil value? and give me solution for that.