fix empty instruction

app.py

@@ -21,7 +21,8 @@ def generate_prompt(instruction, input=None, history=None):
         for pair in history:
             if len(pair[0]) > 0 and len(pair[1]) > 0:
                 history_str += f"User: {pair[0]}\n\nAssistant: {pair[1]}\n\n"
-
+        instruction = history[-1][0]
+        
     instruction = (
         instruction.strip()
         .replace("\r\n", "\n")
@@ -94,7 +95,6 @@ def respond(history=None):
     global token_count_chat, temperature_chat, top_p_chat, presence_penalty_chat, count_penalty_chat
 
     # get the lastest user message and the additional parameters
-    instruction = msg.value
     token_count = token_count_chat.value
 
     temperature = temperature_chat.value
@@ -105,7 +105,7 @@ def respond(history=None):
     history[-1][1] = ""
 
     for character in generator(
-        instruction,
+        None,
         None,
         token_count,
         temperature,