If desired, you can use the <catch> element's count attribute to vary the message based on the number of times that an event has occurred. This mechanism is also used for self-revealing help and tapered prompts.
For example:
<prompt> Name and location?</prompt> <noinput count="1"> <prompt>Please state the name and location of the employee you wish to call.</prompt> </noinput> <noinput count="2"> <prompt>For example, to call Joe Smith in Dallas, say, "Joe Smith in Dallas"</prompt> </noinput>