You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I'm looking for a museum. Sentence2: Yes please. I need a table for 2 on Wednesday at 11:15. Sentence3: That sounds cool, I will just need the area it's in and the postcode. Oh, and how much is the cost to get in? Sentence4: How about 10:15? Sentence5: I have found one Korean restaurant that matches your criteria, the restaurant is named little seoul. Would you like me to make reservations? Sentence6: This museum is free to enter. It is in the centre area, postcode cb23rh. Is there any more information that you need? Sentence7: Yes I am looking for an expensive Korean restaurant in the city center. Sentence8: Little Seoul does not have an empty table at 11:15. Would you like to try a different time, or a different day? Sentence9: Your booking has been successful! The reference number is BV8FODGD . Can I help with anything else? Sentence10: That will be all. Thank you. Sentence11: How about a science museum? Sentence12: Ok, there are 23 museums in Cambridge, was there an area you had in mind, or a type of museum? Sentence13: How about the whipple museum of the history of science? Sentence14: You're welcome! Have a great day. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System