diff --git a/src/interface.jl b/src/interface.jl
index dea4f24..2d90dd1 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -78,9 +78,9 @@ function generatePromt(a::agent,
     if role == "system"
       prompt = replace(systemToken, "content" => content)
     elseif role == "user"
-      prompt *= content * userToken
+      prompt *= " " * content * userToken
     elseif role == "assistant"
-      prompt *= content * assistantToken
+      prompt *= " " * content * assistantToken
     else
       error("undefied condition role = $role")
     end
@@ -144,7 +144,6 @@ end
 
 
 
-
 
 
 end # module
\ No newline at end of file