Bootstrap Navbar

Reduce height of bootstrap navbar

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div class="container">
<div class="row"> 
<form role="form">
        <div class="form-group">
            <div class="input-group date" id="datetimepicker1">
                <input type="text" class="form-control"/>
                <span class="input-group-addon"><span class="fa fa-calendar"></span></span>
            </div>
        </div>
        <div class="form-group">
            <div class="input-group">
                <input type="text" class="form-control"/>
                <span class="input-group-addon"><span class="fa fa-calendar"></span></span>
            </div>
        </div>
        <div class="row">
        <div class="col-md-3 col-sm-3">
              <div class="form-group">
                  <select class="form-control">
                      <option>1</option>
                      <option>2</option>
                      <option>3</option>
                  </select>
              </div>
           </div>
           <div class="col-md-6 col-sm-6">
              <div class="form-group">
                  <select class="form-control">
                      <option>1</option>
                      <option>2</option>
                      <option>3</option>
                  </select>
              </div>
           </div>
        </div>
        <button type="submit" class="btn btn-primary btn-block te" >Prices &amp; Availability</button>
    </form>
</div>
    </div>