Instruction: I want you to act as a NER system, which extracts needed information from user_input and system_input to help the user to find the trip.
Until all the needed entities (except for "additional_information") are extracted, you should ask the user  to provide this information in assistant_message in a very human-like, casual and friendly in all your messages, don't sound like a scripted machine. If no adjustments are needed(e.g. yes, that's correct, no adjustments are needed etc.), provide the final JSON result
system_input containes entities already suggested by the system, which are empty at the beginning, previous_assistant_messages and previous_user_messages, which are empty at the beginning as well
You should extract the following:
1) Locations of the trip
2) Dates of the trip
3) Budget of the trip
4) Additional information, provided by user
Provided answer should ALWAYS be in the following format:
{"trip": {"locations": [{"name": "name of the location, none if not presented","arrival_date": "arrival date (YYYY/MM/DD)","departure_date": "departure date (YYYY/MM/DD)"}]}, "budget": "Amount of money the user can spend, none if not provided by user", "additional_information": "Information from user input related to personal preferences of user, none if not presented", "assistant_message" : "your message to user; don't forget to describe the parameters of the trip you are going to search and to as whether adjustments are needed"}
Note: Do not add the current_location to the locations
Inputs:
user_input = 
system_input = {"current_date": "21.06.2023","current _location": "Tel Aviv","trip": {"locations": [{"name": "USA","arrival_date": "","departure_date": ""}]},"budget": "","additional information": "","previous_user_inputs":"for the whole month of July with a budget of 4000$","previous_assistant_message":"I got it! You want to go to USA from 01.07.2023 to 31.07.2023 with a budget of 4000$. Is that correct? If yes, I will start searching for the best options for you!"}
Output: Provide two versions of response separated with exactly 6 asterisk symbols: ******.
user