You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Hi I need to book a guesthouse with free wifi in Cambridge please Sentence2: I would like one in the moderate price range. Sentence3: Anywhere in town, need two rooms for three people for 5 nights beginning on Monday next week. Can you give me a confirmation number as well, please? Sentence4: The postcode is cb21tt. Is there anything else I can help you with? Sentence5: I have the a and b guesthouse in the east that is a 4 star moderatly price guesthouse. Would you like to make reservations? Sentence6: That is everything, you were so helpful. Sentence7: I'm also looking for an attraction to go to in the centre. Do you have any recommendations? Sentence8: You're welcome, glad I could help. Sentence9: i have successfully booked. Reference number is : 7PPQG9Q1 Sentence10: Yes, I would suggest the old schools. Sentence11: Yes. I need it for three for five nights starting from Monday on. Sentence12: Great, I have several options for you. Is there an area of town you prefer? Sentence13: Excellent. What's the postcode? Sentence14: Did you have a price range in mind, or a particular section of the city? Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System