fix

app/api/routes.py

@@ -29,7 +29,7 @@ def process_dates_to_timestamp(from_time: datetime = None, to_time: datetime = N
     return int(from_time.timestamp()) * 1000 , int(to_time.timestamp()) * 1000
 def get_param_from_dialogflow(body: any):
     session_info = body.get("sessionInfo", {})
-    parameters = session_info.get("parameters")
+    parameters = session_info.get("parameters", {})
     raw_date = parameters.get("date")
     if raw_date is not None:
         raw_date = to_datetime_from_Dialogflow(raw_date)