update unrecorded sound prompts

docs/phrase/phrase_en.xml

@@ -509,6 +509,14 @@
 	  <prompt phrase="There is..." filename="ivr-there_is.wav"/>	
 	  <prompt phrase="That number is on the Do Not Call list." filename="ivr-do_not_call_list.wav"/>	
 	  <prompt phrase="The call attempt has been aborted." filename="ivr-call_attempt_aborted.wav"/>	
+	  <prompt phrase="FreeSWITCH is open source software that is sponsored by OSTAG - the Open Source Telephony Advancement Group." filename="misc-freeswitch_sponsored_by_ostag.wav"/>	
+	  <prompt phrase="OSTAG is advancing the next generation of telephony through open-source software. Learn more at www.ostag.org." filename="misc-ostag_learn_more.wav"/>	
+	  <prompt phrase="To wait for the next available representative, please stay on the line." filename="ivr_to_wait_stay_on_the_line.wav"/>	
+	  <prompt phrase="If you would like us to call you back, press..." filename="ivr-if_you_would_like_us_to_call_back.wav"/>	
+	  <prompt phrase="It appears that your phone number is..." filename="ivr-it_appears_that_your_phone_number_is.wav"/>	
+	  <prompt phrase="Would you like to receive a call at this number?" filename="ivr-would_you_like_to_receive_a_call_at_this_number.wav"/>	
+	  <prompt phrase="Please enter the number where we can reach you." filename="ivr-please_enter_the_number_where_we_can_reach_you.wav"/>	
+	  <prompt phrase="We will return your call at this number as soon as possible." filename="ivr-we_will_return_your_call_at_this_number.wav"/>	
 	  <prompt phrase="" filename=""/>	
     </ivr>
     <misc>