Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Thanks. I am also looking for a particular restaurant, Restaurant One Seven. Can you find the address for me? Sentence2: There are nine cheap guesthouses with free parking. Would you be interested in one of the 4-star properties? Sentence3: Can I get the address on that one? Sentence4: Their phone number is 01223575122. Sentence5: May I please have their phone number? Sentence6: What price range and in what area? Sentence7: Can you let me now what guesthouses in the area have free parking? Sentence8: No, thank you, that's all the information I need right now. Sentence9: Their address is De Vere University Arms Regent Street City Centre. Is there anything else I can assist you with today? Sentence10: I have no specific area but I would like it to be cheap. Sentence11: Yes, you have your pick of several properties around town. Can I recommend autumn house? It's a 4-star guesthouse in the east on 710 newmarket rd. Sentence12: OK, thank you for calling. Have a great day. Goodbye. Sentence13: They are a British place with a moderate price in the centre area, best beef wellington in cambridge, interested in more information? Sentence14: Do any have free wifi? Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System