You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

[EX Q]: Sentence1: No thank you. I do need help finding places to go in town. I'm looking for entertainment in the centre of town. Sentence2: The Alexander bed and breakfast is located in the centre. The phone number is 01223525725. Sentence3: Okay! Just to clarify, from where will you be departing? Sentence4: the address is 56 saint barnabas road Sentence5: what's their address? Sentence6: There are several available. Do you have a preference on if there is a fee or free? Sentence7: I dont see any entertainment in the center of town. Could I try a different area for you? Sentence8: I'd like to stay in a good part of town. Can you please give me the phone number? Sentence9: Okay, how about 2 stars? It does need to include free parking. Sentence10: Great! I have booked a taxi for you. The car will be a yellow audi, and the contact number is 07663388074. Can I help with anything else? Sentence11: ashley hotel is a nice 2 star hotel. Sentence12: Okay, christ's college is free admission. Sentence13: How about a college instead? Sentence14: There are actually no 1-star accommodations anywhere in Cambridge. Sentence15: It is a guesthouse. Want me to book it? Sentence16: Free would be preferable. I also need a taxi. Sentence17: I need a place to stay in Cambridge. It should be either a hotel or guesthouse with 1 star and moderate price range. Can you help me with that? Sentence18: What hotel type is that? Sentence19: I would also like to book a taxi to and from the hotel that leaves by 13:30. Sentence20: I am so sorry. I don't know where my head has been. I need to leave the hotel by 13:30, going to Christ's College. Sentence21: At 4 stars you have many options. What part of town would you like to stay in? Sentence22: you have been of great help thank you Sentence23: How about a hotel with 4 stars instead? Sentence24: I am glad. thanks you too. Question: Who has spoken the sentence 23? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: How about a swimming pool in the same area? Sentence2: I need a place in the east, please. Sentence3: That would be express by holiday inn cambridge. Would you like to book that? Sentence4: No, actually I do need to book the Holiday Inn Cambridge as long as it has free wifi. Sentence5: Um, no thank you. I think that's all I need for today! Sentence6: Thanks, do you know of any colleges near the hotel? Sentence7: Unfortunately I'm not finding any colleges near the hotel on the east side of town. Would you like me to expand my search to another area? Sentence8: The holiday inn cambridge has internet but I do not have any information on whether or not it is wifi or free. Sentence9: Great. Thank you very much for contacting Cambridge Towninfo Centre. Have a great day. Sentence10: Can we go ahead and book that for 5 people for 3 nights starting on Saturday? Sentence11: Can I get the entrance fee and phone number for the Abbey Pool please? Sentence12: We have 5 hotels that meet your request. Is there a specific area you'd like to stay in? Sentence13: Their phone number is 01223902088, and their entrance fee is not listed in our system at this time. Sentence14: Okay, I have you booked for three nights starting on Saturday. Your reference number is PDMS5WA1 . Sentence15: Thank you for using our service. Have we met all of your needs? Sentence16: I'm looking for a hotel in the expensive price range. Internet is not necessary. Sentence17: Yes! The Abbey Pool and Astroturf Pitch is on the east side of town, at pool way, whitehill road, off newmarket road. Can I help with anything else? Sentence18: Ok. That's all I need then. Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I just need to find a train that leaves at 19:30 for 5 people Sentence2: Is there another day you would like me to check? Sentence3: Hi, I'm looking for any information that you have on the Lensfield hotel in Cambridge. Sentence4: Nope that should be it thanks. Sentence5: I only have trains that leave at 20:24 and later on a Friday from Stansted airport. Will this time and day work for you? Sentence6: Alright, I booked 5 tickets for Saturday train your reference number is 1R61PO9r . You can pay for your tickets at the station. Is there anything else? Sentence7: Unfortunately, no trains leave at that time Sentence8: Unfortunately there are no trains that leave at this time. Sentence9: I'm staying for 2 days and it's just myself. What train can I take to depart from the stansted airport that leaves at 19:30? Sentence10: What are the other 4 times of departure for Saturday. I'll need bookings for 5 people and a reference number. Sentence11: Glad to be of service. Have a wonderful day! Sentence12: The Lensfield Hotel is an expensive, 3-star hotel in the south of town, with internet and parking. Would you like me to book it for you? Sentence13: Sure, the phone number is 01223355017. How many days will you be staying, what day do you need to arrive, and how many people will be staying? Sentence14: There are only 4 trains that leave on Saturday Sentence15: I'm actually looking for something on Saturday. Are there any trains on Saturday that leave at 19:30? Sentence16: Yes, please. Can you also give me the phone number? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]:
Answer: (B) System