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

[Q]: Sentence1: It does not matter, I just need one available for 7 people at 18:15 on thursday Sentence2: I'm sorry, nothing is coming up for that particular type of restaurant. Is there any other specifics you may like? Sentence3: The reference number is DVDLH9NK . Is there anything else I can help you with? Sentence4: Unfortunately I could not find any guesthouses meeting those requirements. Sentence5: How many stars is Cityroomz? Sentence6: Before I can book your taxi, what time are you wanting to leave or arrive by? Sentence7: Fantastic. Enjoy your trip! Sentence8: Not yet. I would like you to book a taxi for me between my hotel and restaurant. I will need the car type and contact number. Sentence9: It has a zero star rating, is this ok? Sentence10: I also need the reference number please. Sentence11: I just want to be sure it arrives by the booked time at the restaurant. Sentence12: Cityroomz is the only place that matches your criteria. Sentence13: That is fine. Do they have internet? Sentence14: I have made a reservation at restaurant alimentum for you. Your table will be reserved for 15 minutes. The address is 152 - 154 Hills Road. Sentence15: How about one that serves modern european food? Sentence16: Thank you very much for your help! That was everything I needed. Sentence17: How about a hotel type? Sentence18: There are 3 restaurants serving modern european food, would you prefer one on the south side or town centre? Sentence19: Yes, Cityroomz has internet. Would you like to book it? Sentence20: Booked. Your car type is white skoda and contact number is 07075801794 Sentence21: Can you find me restaurant with moderate prices that serves north indian cuisine? Sentence22: Yes, I also need a guesthouse hotel with moderate prices in the centre. I don't need free parking. Question: Who has spoken the sentence 15? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: I don't have one. how about you pick your favorite attraction and give me the entrance fee, type and phone number. Sentence2: How does the cambridge belfry sound? It's in the west part of town and you'd have access to free parking, too. Sentence3: You're right, we should an attraction first. I'm pretty open to anything as long as its located in the centre. Sentence4: Thank you! Have a great day. Sentence5: Sure, the number is 01954714600. Sentence6: I would like to find an Indian food restaurant Sentence7: I really need a hotel and not a guest house are there any in the area? Sentence8: I'd like to know of interesting places to go situated in the centre of cambridge. Sentence9: Well, I have 44 great thoughts at hand, from beautiful architecture to museums and boating. Let's narrow down your interests- what's your attraction budget? Sentence10: I really like old schools. It is in the centre and has a phone number of 01223332320 Sentence11: looking for a place to stay. The hotel should be in the type of hotel and should include free wifi. The hotel should be in the cheap price range and should have a star of 4. Sentence12: Are you sure you're interested in a restaurant? I know you mentioned earlier you're looking for an attraction. Could you give me more specifics about what attraction you're searching for? Sentence13: Thank you. I don't need anything else from you today. Bye, have a good one! Sentence14: There's a ton of options in the centre. What type of attraction are you interested in? Sentence15: Sure, can I just get their phone number? Sentence16: I would suggest the acorn guest house. Question: Who has spoken the sentence 8? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: No, that's all I needed. Thank you. Sentence2: Of course. When would you like to leave? Sentence3: I am looking for a train departing from london kings cross. Sentence4: Yes, please book the train for 4 people. Sentence5: Okay. Glad we could help. Sentence6: It does not matter as long as I am in Cambridge by 17:00. Sentence7: That booking reference will be F6JIDI3M . Is there anything else I can help you with today? Sentence8: Sure, train TR0269 arrives by 16:08. That is the last train to arrive by 17:00. Would you like to book it? Sentence9: I would like to arrive in Cambridge on Tuesday by 17:00. Sentence10: There are 70 trains departing, what is your destination? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User