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

[Q]: Sentence1: I'm sorry can I help you with anything else? Sentence2: Booking completed! Booked car type blue honda Contact number 07444279931 Sentence3: Can you help me book a taxi? Sentence4: What is your destination? Sentence5: I need to leave the attraction by 15:15 and arrive at the hotel. Sentence6: No thank you. That is all. Sentence7: No preference. You pick. Sentence8: Definitely - Cambridge has many guesthouses. Is there a particular area or price range you had in mind? Sentence9: Thank you. I'm also looking for a place to go in the centre. I'll need the postcode for the attraction. Sentence10: Hi, can you help me find a guesthouse to stay at? Sentence11: You're welcome, glad I could help. Sentence12: Yes please for 2 nights starting from Sunday for 4 people. I will need a reference number. Sentence13: There are many places in the centre of town. Do you have any further preferences or would you like me to recommend one? Sentence14: I do not have a price range in mind. Sentence15: old schools is my favourite. can i give you the details? Sentence16: Your reservation for 4 at alexander bed and breakfast this Sunday for 3 days 2 nights was successful. Your Reference number is : 1FDBJB3A . Sentence17: Thank you very much. Sentence18: Thanks you have a nice day as well. Sentence19: Have a nice day. Sentence20: Sure, I will work on booking that for you. Sentence21: Alexander bed and breakfast comes highly recommended. It is located in the centre area and has a cheap price range, shall I book there for you? Sentence22: That is all I needed thank you for your time. Sentence23: Ok, I have booked you a yellow volvo, contact number 07291792842, is there anything else you need? Sentence24: I do not have a preference. Sentence25: Do you have a price range? Sentence26: Yes I need their postcode. Sentence27: Old Schools postcode is cb21tt. Will there be anything else? Sentence28: Did you get the reference number yet??? Question: Who has spoken the sentence 26? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: I need a place to stay with free wifi. Sentence2: Location doesn't really matter as long as there's free parking available. Sentence3: Ok, I have several hotels. Any particular location? Sentence4: How about the Gonville Hotel located in the centre area of town? Sentence5: What is their postcode? Sentence6: Their postcode is cb11Iy, address gonville place, phone 0122336661 they have wifi and free parking too. Would you like me to book this for you? Sentence7: I have several available. What is your price range? Sentence8: Between $100-$300 per night. Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: Sure, in what area of town were you looking to stay in? What is your price range? Sentence2: Yes it most certainly does. Sentence3: Great. I am also looking for a particular attraction called Old Schools. Sentence4: Yes, actually. That would be very helpful. I want to leave the hotel by 11:00 to head over there. Sentence5: Does it have free parking Sentence6: it is a type of architecture located in the centre of town Sentence7: I booked that for you and the contac number is 07901150688 Sentence8: Thank you so much for calling. I hope you enjoy your trip. Goodbye. Sentence9: I'm not looking for a specific area but I would like it to be a 2 star and expensive please. Sentence10: Okay, the express by holiday inn cambridge matches the criteria. The address is 15-17 norman way, coldhams business park. Would you like me to book a reservation? Sentence11: May I please get the address for Old Schools? Sentence12: Can you help me find a place to stay for my upcoming trip? I am excited to see some of your local attractions. Sentence13: Old Schools are located on Trinity Lane. Can I book a taxi for you to visit this attraction? Sentence14: I have booked that for you. Your confirmation number is WPKWG3R7 . Sentence15: Thank you that is all. Sentence16: Great. Please book it for 3 people for 2 nights starting on tuesday. Question: Who has spoken the sentence 3? (A) User (B) System
[A]:
Answer: (B) System