Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: There are many in Cambridge. Is there a certain area of town you prefer? Sentence2: We are going to be on the westside, anything close by there? Sentence3: cambridge book abd print gallery sounds wonderful. Can I please have their address and phone number? Sentence4: Cambridge book and print gallery is a wonderful place and there is no entrance fee. Will there be anything else today? Sentence5: thank you that will be all for now Sentence6: Will you be needing a reference number? Sentence7: Tell me more about the museum. Sentence8: Is there anything else I can help you with today? Sentence9: Thank you so much. That is all I need today. Sentence10: I would like to find an expensive Indian restaurant in Cambridge. Sentence11: Their address is 49 newnham road and they are located at 01223694264 Sentence12: Yes, please. And I could also use some help finding something fun to do in the west as well. Sentence13: Grat, cant wait to get there, ...wow. I am actually all set now, that went much faster than expected. Thanks for your efficiency. Sentence14: Yes, there are 5. I think you'd really like tandoori place. Want more info? Sentence15: Yes, can you see if you can make a reservation for me for 15:45 on Tuesday for 4 people? Sentence16: Your table has been reserved. The reference # is G0843WFO . There are many fun things to do in town. What kind of things interest you? ...museums, colleges? Sentence17: Oh gosh, I'm so sorry. I must have forgotten that I need the postcode for the museum. Can I get that please? Sentence18: its no problem. the post code is cb39ey Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System