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 also looking for a place to stay. Sentence2: The Cambridge Contemporary Art museum is a fantastic place to visit. It's located at 6 Trinity Street and admission is free! Do you need more information? Sentence3: There is architecture, boats, colleges, museums, and many other things. Sentence4: That will be all for today. Thanks. Goodbye. Sentence5: Okay, if the lack of parking isn't a dealbreaker, you might enjoy cityroomz. Their number is 01223304050. Shall I book a room for you? Sentence6: Recommend something that's in the center of town for me. Sentence7: What area would you like to stay in? Sentence8: I have booked your taxi. Be expecting a red Honda. Their phone number is 07543221637. Sentence9: Free parking would be nice but it is not a necessity. Sentence10: I want to stay in the center of town in a 0 star hotel that is moderately priced and has free parking. Sentence11: Yes please. I'll need to for 8 people for 4 nights starting Wednesday Sentence12: There's not an exact match to fit your needs. There's a hotel without free parking available. Or, if you need the free parking, would a cheap guesthouse work instead? Sentence13: Yes, I also need a taxi from the hotel at 16:30. Sentence14: Done! Your reference number is 07Z05P6U . Do you need anything else? Sentence15: Thank you for using our system today! Sentence16: I am looking for places to visit in downtown Cambridge. What are some popular attractions? Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System