reservation.xml

<?xml version="1.0"?>
<vxml version="2.1" application="main.xml" >
  <var name="total" expr="0" />
  <form id="reservation">
    <subdialog name="search" src="search.xml">
      <filled>
        <if cond="search.trip == null">
          <goto next="#new_reservation" />
        </if>
      </filled>
    </subdialog>
    
    <field name="tclass">
      <grammar type="text/gsl" src="grammar.gsl#CLASS" />
      <prompt>In which class would you like to travel?</prompt>
    </field>
    
    <field name="nseats" type="number">
      <prompt>Please say or enter the number of seats you would like to reserve.</prompt>
    </field>
    
    <field name="confirm" type="boolean">
      <prompt>You want to reserve <value expr="nseats" /> <value expr="tclass" /> class seats, in trip <say-as interpret-as="number" format="digits" ><value expr="search.trip.id" /></say-as>, from <value expr="search.trip.from" /> to <value expr="search.trip.to" />. The cost of the reservation is <value expr="sayPrice(calculateCost(search.trip,nseats,tclass=='first'))" />. Do you want to continue? </prompt>
      <filled>
        <if cond="!confirm">
          <clear namelist="search class nseats confirm" />
          <prompt>Let's start over.</prompt>
          <goto next="#reservation" />
        <else />
          <assign name="total" expr="total + calculateCost(search.trip,nseats,tclass=='first')" />
          <prompt>Reservation complete.</prompt>
          <prompt>You current total is <value expr="sayPrice(total)" />.</prompt>
          <goto next="#new_reservation" />
        </if>
      </filled>
    </field>
    
  </form>
  
  <form id="new_reservation">
    <field name="confirm" type="boolean">
      <prompt>Would you like to reserve another trip?</prompt>
      <filled>
        <if cond="confirm">
          <goto next="#reservation" />
        <else />
          <prompt>Your total is <value expr="sayPrice(total)" />.</prompt>
          <goto next="main.xml#bye" />
        </if>
      </filled>
    </field>
  </form>
</vxml>