Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Can I help you with anything else? Sentence2: Yes. Need it in the east. Star of 4 and do not care about parking, but do need it to be a hotel not guesthouse. Sentence3: I'd like to stay in the east. I'm looking for a 4 star hotel. I don't need any parking. Sentence4: Sorry, Im her husband, Ill take over the call, my wife is a little picky and confused. Please book the guesthouse, 4 people, 4 nights starting wednesday. Sentence5: Thank you for calling Cambridge TownInfo centre! It was a pleasure to help you, I hope you enjoy your time in Camridge! Sentence6: I'm sorry, after taking a second look, the Autumn House is not located in the east area. Would A&B Guest House be okay? It's also 4-star. Sentence7: I'm afraid that I don't have that information. Can I help you with anything else? Sentence8: There aren't any 4 star hotels available in the east. Sentence9: If that information is not available, then that's all I need today. Sentence10: i need a place to stay Sentence11: Between Victoria Road and The River, cb43px. Would you like to know more about the place? Sentence12: Do you have any places that are hotels, not guest houses? Sentence13: Okay that booking was successful and your reference number is SYX1AD7L . Sentence14: Okay, I recommend the Autumn House. It is a guest house in the cheap price range. Would you like me to book a reservation? Sentence15: No, thank you. Sentence16: I am sorry but there are no 4 star hotels in the east. Is there another area you would like to look at or possibly reserve the guesthouse? Sentence17: Great! I was also interested in finding a swimming pool in the north. Sentence18: I guess I'll book the guesthouse for 4 people, 4 nights starting wednesday. Sentence19: Sure, do you have an area of town you want to stay in? Sentence20: I need their entrance fee please Sentence21: I'm afraid I don't have that information available. Can I help you with anything else? Sentence22: Sure, Jesus Green Outdoor Pool is a nice one. It is located between Victoria Road and the River. Sentence23: Yes, can I have the address and postcode, please? Sentence24: What is the entrance fee? Question: Who has spoken the sentence 23? (A) User (B) System
A:
Answer: (B) System