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: I am traveling between the two places. I need to leave the restaurant by 23:15. Sentence2: All saints church is architectural and located in the centre of town. Sentence3: Charlie Chan is a cheap chinese restaurant in the centre of town. Would you like more information or to book a table? Sentence4: You're all set! Your car will be a red tesla and their contact number is 07799680227 should you need to contact them! Sentence5: Nah, that's not necessary. I just need the postcode, please. Sentence6: Thank you for all your help! That will be all for today! Sentence7: I've just double checked. Cambridge doesn't have any Polynesian restaurants at all. Can I look for something else for you? Sentence8: I also want a moderately priced Polynesian restaurant. Sentence9: Sure. The All Saints Church is located at jesus lane. Sentence10: I was hoping you can help me find a place to go that has to do with architecture. Sentence11: How about chinese food? Sentence12: You're welcome, have a great day! Sentence13: That would be fine. Can I get the address please? Sentence14: Certainly! What are your departure and arrival destinations and when would you like to leave or arrive by? Sentence15: Could you check again? Sentence16: I also need a taxi. Sentence17: The post code is CB21DB for Charlie Chan's. May I assist you any further? Sentence18: I am sorry but there are no moderately priced Polynesian restaurants. Would you like a different type of food or price range? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System