You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: what time do you need to leave or arrive by? Sentence2: i want to leave the attraction by 15:00 Sentence3: That is all, thanks. Sentence4: There are quite a few Indian restaurants in the centre and since money is no object, I recommend the curry garden. Would you like me to book you a reservation there? Sentence5: Hi there. I am looking for some information on places to go in town. Sentence6: Have a nice day. Sentence7: What types of attraction are you interested in? Sentence8: Your taxi reservation on a white Ford is complete. You will be picked up by 15:00 at Corpus Christi and dropped off at Curry Garden. The contact number is 07699910200 Sentence9: Sure. The Curry Garden is located at 106 Regent Street at the City Centre. The postcode is cb21dp. Sentence10: You should go to Corpus Christi, the phone number is 01223338000 with a postcode of cb23bu. Can I assist you further today? Sentence11: Is there anything else I can assist you with today? Sentence12: The attraction should be in the center and should be in the type of college. Make sure you get phone number and postcode. Sentence13: Yes, I'd like to find a good restaurant please. I'm in the mood for Indian food and money is no object. Sentence14: Great, thanks very much! Sentence15: Great I also need a taxi that will help me commute between the two places. Sentence16: I'm not ready to book a table yet. Can I get the address including postcode, please? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User