diff --git a/askchat/askchat.py b/askchat/askchat.py
index ac1fbb8..2369d54 100644
--- a/askchat/askchat.py
+++ b/askchat/askchat.py
@@ -52,6 +52,7 @@ def main():
     parser.add_argument("--api-key", default=None, help="API key")
     ## Chat with history
     parser.add_argument('-c', action='store_true', help='Continue the last conversation')
+    parser.add_argument('-r', action='store_true', help='Regenerate the last conversation')
     parser.add_argument('-s', "--save", default=None, help="Save the conversation to a file")
     parser.add_argument("-l", "--load", default=None, help="Load the conversation from a file")
     parser.add_argument("-p", "--print", default=None, nargs='*', help="Print the conversation from " +\
@@ -166,11 +167,15 @@ def main():
     if isinstance(msg, list):
         msg = ' '.join(msg)
     assert len(msg.strip()), 'Please specify message'
-    if args.c and os.path.exists(LAST_CHAT_FILE):
+    if os.path.exists(LAST_CHAT_FILE):
         with open(LAST_CHAT_FILE, "r") as f:
             chatlog = json.load(f)
-        chatlog.append({"role":"user", "content":msg})
-        msg = chatlog
+        if args.c:
+            msg = chatlog + [{"role":"user", "content":msg}]
+        elif args.r:
+            if len(chatlog) > 0:chatlog.pop()
+            if len(chatlog) > 0:chatlog.pop()
+            msg = chatlog + [{"role":"user", "content":msg}]
     
     # call the function
     chat = Chat(msg)