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

[Q]: Sentence1: Unfortunately, I am not seeing any 4 star hotels that are moderately priced in the centre. We could try a cheaper hotel or a guesthouse? Sentence2: Sure do. Their address is fulbourn, postcode cb15dh. Phone number is 01223295264, and entrance is free. It's a museum on the Eastside. Sentence3: Nevermind. Do you have info on gallery at twelve a high street. Sentence4: Thank you very much for your help, have a nice day. Sentence5: Thank you, enjoy your stay in cambridge. Sentence6: Of course. We have so many attractions! What part of town will you be in? Sentence7: I will be visiting Cambridge soon and can't wait to see some of your local attractions. I do need your help with some information. Sentence8: I'm sorry, but there are no cheap hotels in the center of town, either. The only cheap hotel is on the west side. Sentence9: How about in the cheap price range? Sentence10: I have two options. Would you prefer a hotel or a guesthouse? Sentence11: I need a 4 star room in the centre please. Sentence12: A hotel in the moderate price range. Thank you! Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Your reservation was successful and your reference number is UO8AN5FO . Is there anything else that I can help you with today? Sentence2: I am looking for the Alpha-Milton Guest house and would like to book it for 5 people for 2 nights starting Friday. Can you send me the reference please? Sentence3: That's all, thank you so much! Sentence4: Thank you for calling, enjoy! Goodbye. Sentence5: Sure, what is the name of the hotel? Sentence6: Hello. Can you help me in locating a certain hotel? Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: How about italian food? Sentence2: I would prefer welsh food, please! Sentence3: I have found many restaurants with the criteria you gave me offering different kinds of food. Do you have a preference for type of food? Sentence4: That was all I needed for now. Thanks Sentence5: Thank you for using our services. Sentence6: That is everything, still ironing out details, so I will call them later, thanks for your help. Sentence7: You are quite welcome. Do you need any further assistance? Sentence8: Sure. What is their phone number and address there Sentence9: I don't have any Welsh restaurants that meet your criteria. Would British or European be ok, or would you like a more exotic cuisine instead? Sentence10: i am looking for a restuarant in the expensive price range and should be in the centre Sentence11: How about cafe uno? Sentence12: Caffee Uno is located at 32 Bridge Street City Centre and the phone number is 01223448620. Question: Who has spoken the sentence 7? (A) User (B) System
[A]:
Answer: (B) System