gistfile1.rb

command :set?, :execute?, :node => "create" do |command|
  # Send empty form
  r = command.reply
  r.status = :executing
  r.new_sessionid!
  r.allowed_actions = [:cancel, :execute]
  r.primary_allowed_action = :execute
  r.form
  r.form.type = :form
  r.form.title = "Create Call"
  r.form.instructions = "Enter the SIP address of the caller and callee."
  r.form.fields = [
    {:label => 'From', :type => 'text-single', :var => 'from', :required => true},
    {:label => 'To', :type => 'text-single', :var => 'to', :required => true},
    {:label => 'Call Setup ID', :type => 'text-single', :var => 'call-setup-id'}
  ]
  write_to_stream r
end

gistfile2.xml

<iq from="commands.active-calls.messaging.studiotalker.com" type="result" to="admin@studiotalker.com/desktop" id="aaf8a" lang="en" >
<command xmlns="http://jabber.org/protocol/commands" status="executing" node="create" sessionid="6ac909a3bd407cb21c8a30943854a2ad14a02bd6" >
<actions execute="execute" >
<cancel/>
<execute/>
</actions>
<x xmlns="jabber:x:data"/>
<x xmlns="jabber:x:data" type="form" />
<x xmlns="jabber:x:data">
<title>Create Call</title>
</x>
<x xmlns="jabber:x:data">
<instructions>Enter the SIP address of the caller and callee.</instructions>
</x>
<x xmlns="jabber:x:data">
<field type="text-single" label="From" var="from" >
<required/>
<option/>
</field>
<field type="text-single" label="To" var="to" >
<required/>
<option/>
</field>
<field type="text-single" label="Call Setup ID" var="call-setup-id" >
<option/>
</field>
</x>
</command>
</iq>