You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Can you also find an attraction called Milton Country Park? Sentence2: Booking was successful, your reference number is RKEFYHM0 . Will that be all? Sentence3: no, let's just book it. Sentence4: I'm looking for a place to stay, I would prefer a hotel in the expensive price range. Sentence5: We have lots of those. Did you have something a little more specific in mind? Sentence6: I would like it for 2 people and 4 nights starting from monday. Sentence7: Sounds like a plan. May please get the number of guests, the day of arrival, and how many nights you will be staying? Sentence8: I like the Express by Holiday Inn Cambridge. Can I get you some more information on that one? Sentence9: No. That will be all. Thanks so much for all your help. Goodbye Sentence10: Whatever you'd recommend. I would prefer free parking and wifi, though. Sentence11: Thank you, have a good day. Sentence12: Yes it is located at milton country park, milton and the postcode is cb46az Sentence13: Sure. Milton Country Park is a park. Can I help you with anything else today? Sentence14: Could you tell me what kind of attraction that is? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System