|  |  | 
 |  |  |          responseAck(evt, Response.OK); | 
 |  |  |          Dialog dialog = evt.getDialog(); | 
 |  |  |          CallIdHeader callIdHeader = (CallIdHeader)evt.getRequest().getHeader(CallIdHeader.NAME); | 
 |  |  |          if (dialog == null) return; | 
 |  |  |          if (dialog == null) { | 
 |  |  |             return; | 
 |  |  |          } | 
 |  |  |          if (dialog.getState().equals(DialogState.TERMINATED)) { | 
 |  |  |             String platformGbId = ((SipURI) ((HeaderAddress) evt.getRequest().getHeader(FromHeader.NAME)).getAddress().getURI()).getUser(); | 
 |  |  |             String channelId = ((SipURI) ((HeaderAddress) evt.getRequest().getHeader(ToHeader.NAME)).getAddress().getURI()).getUser(); |