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: Cotto is fine. I want to book a table for 1 person at 12:00 on Sunday. Sentence2: Cotto is completely booked for Saturday at noon. Could I direct you to a different restaurant? Sentence3: no, that will be all. thank you very much. Sentence4: Have a great day! Sentence5: Yes, please book me a different restaurant in the same area and price range. Sentence6: Restaurant one seven is also British cuisine, moderate priced, in the center of town and they are able to accommodate your reservation. Sentence7: I have booked your reservation for restaurant one seven on Saturday at 12:00. Your reference number is DYSZRX2B . Do you need any other assistance? Sentence8: Thank you that sounds like a great place. Sentence9: Are there any moderately priced places to eat with British styled food? Sentence10: Yes, I have 5 places. What about cotto? Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System