Implementing VRbot Trigger word

Hi,
I have been working on the following code and am trying to implement the trigger word and some custom command words. Any example codes with custom words and trigger word would be appreciated!

#include <NewSoftSerial.h>

  int i;
  char reader;
  NewSoftSerial tx(30, 3); //tx on 14
  NewSoftSerial rx(2, 30); //rx on 12

void setup()
 {
   
  for(i=4; i<=13; i++)
  pinMode(i, OUTPUT);
 
   reset();
  Serial.begin(9600);
  tx.begin(9600);
  rx.begin(9600);
  delay(1000);
  
  tx.print('b');
  for(i=0; i<100; i++){
    if (rx.read()=='o'){
      Serial.println("awake");
      break;
    }
    delay(1);
  }
  tx.println('x');
  for (i=0; i<100; i++){
    if(rx.read()=='x'){
      Serial.println("x reveived");
      break;
    }
      delay(1);
  }//for
  tx.println(' ');
  for(i=0; i<100; i++){
    if(rx.read()=='A'){
    Serial.println("firmware good");
    break;
  }
  delay(1);
  }//for
   tx.print('l');
   tx.println('A');
   for (i=0; i<100; i++){
   if(rx.read()=='o'){
    Serial.println("language set");
    break;
   }
   delay(1);
   }//for
 
  tx.print('o');
  tx.println('A');  
  for (i=0; i<100; i++){
   if(rx.read()=='o'){
   
     Serial.println("Infinite Timeout");
     break;
   }
   delay(1);
  }//for
  tx.print('i');
  tx.println('D');
 Serial.println("Wordset 3");
 
  }//setup
 
 void loop()
 {
  reader = rx.read();
 if(reader=='s'){
  delay(100);
 tx.print(' ');
 }//read

  if(reader=='B'){
   reset();
   digitalWrite(4, HIGH);
  }
   if(reader=='C'){
   reset();
   digitalWrite(5, HIGH);
 //  delay(100);  
  }

   if(reader=='D'){
   reset();
   digitalWrite(6, HIGH);
    }

   if(reader=='E'){
   reset();
   digitalWrite(7, HIGH);
    }
    
   if(reader=='F'){
   reset();
   digitalWrite(8, HIGH);
    }
   if(reader=='G'){
   reset();
   digitalWrite(9, HIGH);
    }
    
   if(reader=='H'){
   reset();
   digitalWrite(10, HIGH);
    }
    
   if(reader=='I'){
   reset();
   digitalWrite(11, HIGH);
    }
   if(reader=='J'){

   digitalWrite(12, HIGH);
    }
   if(reader=='K'){
   reset();
   digitalWrite(13, HIGH);
    }
    
    if(reader=='t')
    reset();
    if(reader=='e')
    reset();
 }
    void reset() {
      for(i=4; i<=13; i++)
      digitalWrite(i, LOW);
      delay(100);
      tx.print('i');
      tx.println('D');
    }

My aim is to say a trigger word, and then say a command word (out of a set of 4 words)
I really appreciate all the help I can get.

Thank you,

-Ummuu