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

[EX Q]: Sentence1: Yes. I will be staying 5 nights starting Friday. Sentence2: Im also looking for the cow pizza kitchen and bar. Whats the address for it? Sentence3: its address is Corn Exchange Street. what else can i do for you? Sentence4: Oh, expensive please. I do hope it is a guesthouse? Sentence5: You have helped me with everything I need. Thank you. Sentence6: Anytime. Enjoy your visit. Sentence7: I'll be staying for 5 nights. Sentence8: Unfortunately they are both hotels. Sentence9: Booking was successful. Reference number is : GQPN80PK . Is there anything else I can assist you with today? Sentence10: Okay I've got three options here. Would you like a cheap or an expensive price range? Sentence11: Can you help me locate a hotel to stay at that has free parking and a 4 star rating? Sentence12: Oh. I would really prefer a guesthouse. How about the moderate price range? Sentence13: Okay, I recommend The Acorn Guesthouse. Would you like me to book there? Sentence14: NO problem. How long are you staying? Sentence15: The location isn't important. I need to book it for Friday, please. Sentence16: They are moderate, it is a gastropub, in case you need them, the postal is cb23qf and the phone number is 01223308871, can I assist with anything else? Sentence17: I have 9 guesthouses in the moderate price range, do you have a location preference? Sentence18: I need it's price range please Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: You're welcome, glad I could help. Sentence2: I personally like Parkside Pools. It's in the center of town, on Gonville Place. Sentence3: Any area is fine. Which of the 4 swimming pools do you suggest? Sentence4: It is cb11ly. Is there anything else I can help you with? Sentence5: Where will you be departing from? Sentence6: Thanks. That was all I needed. Goodbye. Sentence7: I am departing from Cambridge. Sentence8: I am looking for information on places to go in Cambridge. Can you help with that? Sentence9: My destination is london kings cross Sentence10: Can I get the postcode as well? Sentence11: I can help with that. Is there a particular area you're interested in? Sentence12: Yes, there are 4 swimming pools that match those requirements. Is there a particular area you would like to go to? Sentence13: There are 278 trains that meet that criteria. Would you like to narrow down your options by departure site, destination, or arrival time? Sentence14: I have made that reservation and your reference number is 1702SDBO . Sentence15: TR1502 arrives in london kings cross friday at 11:51. Would you like me to book you any seats? Sentence16: I also need a train leaving after 11:00 on friday Sentence17: What I'd really like is to find a swimmingpool. Sentence18: Yes book for 8 people and I need a reference number Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: We have 2 other choices - both of which are moderately priced guesthouses in the South. The guesthouses are bridge guest house and aylesbray lodge guest house. Do you have a preference? Sentence2: You're welcome. Have a great trip! Sentence3: I'd be happy to. Do you have a specific date and time for your departure? Sentence4: Yes, I'll also need a place to stay in the south and would prefer a guesthouse. Sentence5: Yes, can you try 2 nights please? Sentence6: Can you book one for 4 people for 4 nights starting Tuesday please. Sentence7: No specific price range, but I do need free parking. Sentence8: Unfortunately, none are available for that stay. Would you like me to check availability for a shorter stay? Sentence9: I would like to try for 2 nights since there is no space and I want it for 4 people please. Sentence10: I want to leave on Saturday and should arrive by 18:00, I have a doctors appointment to see to. Sentence11: Yes, they all offer free parking. Sentence12: I need a train that departs from cambridge and arrives at london liverpool street. Can you help me? Sentence13: Let's try a different guesthouse in the south, then. Sentence14: Rosa's Bed and Breakfast is a great one in that area and cheap. It includes free parking and wifi. Would you like me to book you a room? Sentence15: Yes what is the price, departure time, and travel time? Sentence16: Yes, please. I would like to book for two nights and two people starting Saturday. Sentence17: You are welcome, enjoy your trip. Sentence18: Unfortunately there is no space for your request. Would you like to check another hotel or change the length of stay? Sentence19: Thank you for using our services. Is there anything else I can help you with today? Sentence20: Do either of them offer free parking? Sentence21: It is 13.28 pounds, will arrive 15:27, and the travel time will be 88 minutes. Can I help you with anything else? Sentence22: Thank you, that is everything i need. Sentence23: Im sorry i was unable to book that. Is there another hotel you would like to try? Sentence24: Are you trying to shorten your stay? And, may I confirm the stay is for 2 people? Sentence25: The TR4466 arrives in London Liverpool Street at 15:27, would that be acceptable? Sentence26: Nope that is thanks Sentence27: I was able to book aylesbray lodge guest house for 2 days with 4 people. Reference number is AULI4NVQQ . Sentence28: Glad to be of service! So long. Sentence29: ok I have a few options. Is there a price range you would like to stay at? Sentence30: How about for just two nights 4 people at Rosa's Bed and Breakfast? Question: Who has spoken the sentence 28? (A) User (B) System
[EX A]:
Answer: (A) User