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

Sentence1: Pick any of them, please. Book it for 6 people and 3 nights, starting thursday. Sentence2: I need something with free parking and a 4 star rating. Sentence3: I have 24 guesthouses. Let's narrow it down a bit. Do you have a price range? Sentence4: I am showing 18 colleges. Is there a certain area of town you would like? Sentence5: What is the postcode of Corpus Christi? Sentence6: Booking was successful. Reference number is : 2WPLODLS . is there anything else i can help you with? Sentence7: Not really. Which do you think would be the most interesting to visit? Sentence8: That cuts it down to 16. I can recommend the Acorn guest house, or do you have a pricerange or area of town you want to stay in? Sentence9: I would suggest Christ's college in the city centre or Corpus Christi college in the west. Christ's college is free and Corpus Christi costs 2 pounds? Which do you want? Sentence10: Hello, any interesting colleges in town? Sentence11: Their postcode is cb21rh. Can I assist you with anything else? Sentence12: I am looking for a guesthouse to stay in. Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: You're welcome, have a great day. Sentence2: I also need a train ticket. Sentence3: Booking was successful, the total fee is 115.5 GBP payable at the station . Reference number is : U0JGF786 . Sentence4: Yes, please book for 7 people, and give me the reference number. Sentence5: Hi, I'm looking for a theater. Sentence6: ADC Theatre in the centre is nice. Would you like the address? Sentence7: The train should arrive by 19:00 and should depart from cambridge. Sentence8: I'd be happy to help you find a train. Where would you be departing from and where would we be going to? Sentence9: Not especially, could you give me a recommendation? Sentence10: What time would you like to arrive or leave? Sentence11: I have a train leaving Cambridge at 5:06 and arriving to Peterborough at 5:56. The price is 16.50 pounds per ticket, would you like me to book it? Sentence12: Yes, please. Also, what is their phone number? Sentence13: Do you have a location preference? Sentence14: Awesome, thanks a lot. That's all I needed today. Sentence15: The phone number is 01223300085 and the address is on park street, postcode cb58as Sentence16: I will be going to Peterborough from Cambridge. Hoping to leave on Monday. Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: That's perfect. That's all I need for now. Sentence2: I would like to take a train from Cambridge to Leicester. I have to get there for a dinner by 19:15. Sentence3: It doesn't matter, just pick the one you think is best! Sentence4: I have train TR4506 that leaves at 17:21 and arrives in Leicester at 19:06. Would this work for you? Sentence5: It is on Tuesday. Sentence6: yes those we have quite a few of, how can I help you? Sentence7: Okay, your trip has been booked. Train# TR4506. Leaving at 17:21, arriving at 17:06. Total cost is 37.79 GBP payable at the station. Your reference number is 244DG7UO Sentence8: Clare college is a nice place and phone is 01223336233 Sentence9: Can you possibly find me a swimming pool in the West? Sentence10: Do you need free admission or pay to get in? Sentence11: how about one that is in the type of college? Sentence12: Any you suggest will be fine. I'll just need the postcode, phone number, and entrance fee, please? Sentence13: I can help with that. What day is your dinner? Sentence14: There are no swimming pools in the west. Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User