Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: Yes, that will. Can you please reserve a room for 4 nights beginning on Sunday. There will be six of us. Sentence2: The Acorn Guest House is in the north and moderately priced. Will that suit you? Sentence3: What area of town do you want to stay in? Sentence4: No thanks, that's all I needed. Sentence5: That is all I need, good day. Sentence6: I am excited to eat at some great restaurants during my visit. Can you help me find a guesthouse? Sentence7: I am also looking for an expensive Indian restaurant nearby. Sentence8: No particular area, could you give me a recommendation? Sentence9: I'll need a guesthouse that has free wifi that has a rating of 4 stars. Sentence10: 01223302330. Post code is cb21dp. Is there anything else you will need? Sentence11: Can I have the phone number and postcode please? Sentence12: In the centre please. Sentence13: Would you like me to book it for you? Sentence14: Okay, have a great trip! Sentence15: I was able to book your room per your request. Your reference number is : 40VQ9ANP . Was there anything else you needed? Sentence16: In what area would you like it to be? Sentence17: I would suggest this place the golden curry. Sentence18: Sure, got an area of town you want to stay in? Question: Who has spoken the sentence 13? (A) User (B) System
A:
Answer: (B) System