Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: The cambridge chop house sounds good. Could you book it for 5 people at 19:45 on monday? Sentence2: If there is anything else I can help with you please call back. Thank you and have a great day! Goodbye! Sentence3: Yes, actually. Is there one that is expensive? Sentence4: You're booked and the reference number is BQT142V9 . The table will be reserved for 15 minutes. Is there anything else you need? Sentence5: Can you help me find a place to eat located in the centre that serves british food? Sentence6: Yes, can you try the same for 18:45 instead? Sentence7: Unfortunately, there is no availability for your party at that time. Would you like to book a different time slot or day? Sentence8: they are fitbillies restaurant, the cambridge chop house and the midsummer house restaurant Sentence9: There are 7 places in the centre area that serve British cuisine, do you have a preference on price range? Sentence10: Thank you and Goodbye Sentence11: What are their names? I need to choose one I can book a table at. Sentence12: Yes, I've found three all in the city centre. Is there one of these that you would prefer? Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System