Added PersonaConverter call func

utils.py

@@ -9,6 +9,7 @@ def convert_history(history):
 
 class PersonaConverter:
     personas = {
+        "None": "",
         "UrbanLogic": 
             (
                 "You are an AI bot that specializes in smart city planning. "
@@ -42,4 +43,22 @@ class PersonaConverter:
 
     short = (
         "You're attempting to provide a concise response within a 40-word limit.\n"
-    )
+    )
+
+    def __call__(self, name: str, description: str, imaginary: bool, short: bool):
+        system_prompt_list = []
+        if (name != "None"):
+            system_prompt_list.append(self.personas[name])
+
+        if (len(description) != 0):
+            system_prompt_list.append(f"{description}\n")
+
+        if imaginary:
+            system_prompt_list.append(self.imaginary)
+
+        if short:
+            system_prompt_list.append(self.short)
+
+        system_prompt = "\n".join(system_prompt_list)
+
+        return system_prompt