At {TAIL ~ any stage} of {HEAD ~ the process}, if voice recognition is not available or does not obtain the address, operator involvement can be used whether or not the operator actually interfaces directly with the caller 
At { TAIL ~ any stage } of { HEAD ~ the process } , if voice recognition is not available or does not obtain the address , operator involvement can be used whether or not the operator actually interfaces directly with the caller
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH