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

[EX Q]: Sentence1: Can you check a swimming pool in the west of the city? Sentence2: Yes, there are no swimming pools located to the west of your city. Thank you, if you need help with anything else, contact us again. Sentence3: No thank you, that's all I needed. Sentence4: I have 3 hotels and 2 guesthouses in town centre. Would you like a cheap price range or expensive? Will you also need parking? Sentence5: Okay! Goodbye! Sentence6: I would prefer a guesthouse, and it does not need to include internet. Sentence7: If you change your mind and need a booking, we'll be here. Thanks for using our service! Sentence8: I'd prefer one in the same part of town as my hotel, are you sure there isn't one? Sentence9: We currently do not have any shown attraction in that area you are looking for. Are there any other further things I could assist with? Sentence10: Goodbye. And feel free to contact us if there's any other information you need, as well. Sentence11: The alexander bed and breakfast is a guesthouse in town centre in the cheap price range with a 4 star rating. Would you like to book a room? Sentence12: I am looking for a place to stay in the centre in Cambridge. Sentence13: I'm not showing a swimming pool in the East, but there are 2 in the North, will that work? Sentence14: I am also looking for an attraction, a swimming pool Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: It has a 3 star rating. Sentence2: Could you tell me if The Lensfield Hotel has at least a 4 star rating? Sentence3: Find me an expensive place to stay on the south side, please. Sentence4: Yes I would like to make a booking. Sentence5: You're welcome. Have a great day! Sentence6: No, The only hotel I see has a 3 star rating. Sentence7: You know I also need someplace to eat in that is also cheap, and also in the south area. Sentence8: There is only one expensive hotel on the south side. Would you like to book at The Lensfield Hotel? Sentence9: Okay, how many guests and how many nights would you like me to book? Sentence10: How about a hotel in the cheap price range? Sentence11: I would also like a taxi to arrive by my booked time. can i have the taxi contact number and car type Sentence12: Lets go with The Lucky Star. I need a table for 8 people at 13:45 on Friday. Sentence13: Great it's all booked the reference number is MXDZ66IK Sentence14: You have your choice of The Lucky Star, with Chinese cuisine, or Nandos, a portuguese restaurant. Sentence15: Sure, the car will be a blue lexus and the contact number is 07235433780. Anything else I can help you with? Sentence16: I see, are there any cheap 4 star hotels on the south side? Sentence17: Nope, that is all. Thank you very much. Sentence18: Rosa's bed and breakfast is a guesthouse is a 4 star. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Christ's College looks good, it's in the city centre and has a free entrance fee. Sentence2: Yes, I also need a train leaving on Monday. Sentence3: Can you tell me where you will be departing from and heading to, please? Sentence4: Can you give me their phone number and postcode? Sentence5: Thank you, that will be all. Sentence6: Do you have a college to recommend instead? Sentence7: No, thank you. That will be all. Thanks! Sentence8: I would recommend the train that leaves at 13:54. Would you like me to book that? Sentence9: Does that train arrive by 17:00? Sentence10: Thank you and goodbye Sentence11: I will be leaving from Stevenage and heading for Cambridge. Sentence12: It is 12.80 pounds. Sentence13: Is there a time you would like to leave by or arrive by? Sentence14: Yes, it arrives at 14:43 Sentence15: What is the price of this particular train? Sentence16: I'm looking for a place to go in the centre. Sentence17: Alright, just to confirm you do not need me to book you for the train? Sentence18: How about All Saints Church? Sentence19: Sure! The phone number is 01223334900 and the postcode is cb23bu. Is there anything else I can help you with today? Sentence20: From stevenage to cambridge please Question: Who has spoken the sentence 19? (A) User (B) System
[EX A]:
Answer: (B) System