Why not use several possible responses:
	Code:
	NPC_SCRIPT 1{ 
trigger_text:Hail:{ 
say:I am a soulbinder. I can bind you here. Do you want your [soul bound]? 
} 
trigger_text:soul bounded:{ 
FACE_TARGET 
SAY:I shall bind your soul, great traveler. 
CAST_SPELL 35 
} 
trigger_text:yes:{ 
FACE_TARGET 
SAY:I shall bind your soul, great traveler. 
CAST_SPELL 35 
} 
trigger_text:get me stuck me here forever and ever:{ 
FACE_TARGET 
SAY:I shall bind your soul, great traveler. 
CAST_SPELL 35 
}
 
 ok that last one was just for the fun of it