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

Sentence1: Yes please, two people for two nights on sunday. Sentence2: Yes! Can you book for 2 people at 14:15 on this Sunday? Sentence3: Reference number is : E9BM21NJ . Is there anything else I can assist you with? Sentence4: Are you sure there is nothing more I can help with today? Sentence5: Great that will be all we need. Sentence6: Can you help me find a place to eat in the expensive price range in the south part of town? Sentence7: I have one matching result. It is the lensfield hotel. Do you want to reserve a room? Sentence8: I was able to book your party of 2 into The Chop House on Sunday at 14:15 Reference: MUWLBLLW . May I assist with more today? Sentence9: What about the cambridge chop house. The address is: 1 Kings Parade. You you like me to book a table? Sentence10: Do you have a reference number? Sentence11: This time that is everything, thank you for your help. Sentence12: Actually yes I will be needing somewhere to stay too please. A 3 star hotel in the same area and price range as my restaurant. Sentence13: You are welcome enjoy. Sentence14: Ok, I've booked the Lensfield Hotel for you for 2 people and 2 nights starting Sunday Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Id is TR0625, travel time is 79 minutes and you will arrive by 22:55. Anything else? Sentence2: Actually, could you help find a train as well? To Norwich? Sentence3: I found a train from cambridge to norwich at 05:36 on Friday, will that work? Sentence4: Sunday would be good. Sentence5: No, you've answered all of my questions. Thanks so much for your time. Bye. Sentence6: The Acorn Guesthouse is a 4 star hotel located in the north side of town. It includes free internet and parking. Would you like me to book it for you? Sentence7: I need to leave after 21:30, is there anything closer to that time? Sentence8: Thank you, and thanks again for using our free service. Sentence9: I am trying to find the Acorn Guest House. Sentence10: No, just leave after 21:30. Will you give me the travel time, arrival time and the Train ID? Sentence11: No, thanks. I will go ahead and book it myself. I think I have all the information I need. Thank you. Sentence12: Is there a time you need to arrive by? Sentence13: Yes there are 14 trains. Which day would you like to depart? Sentence14: Thank you for using our service, have a nice day. Question: Who has spoken the sentence 11? (A) User (B) System
Answer: (B) System

Sentence1: That is correct! One ticket has been booked and your reference number is WB6YZLP0 . Is there anything else I can assist you with? Sentence2: I just needed to find out if they offer free parking there. Sentence3: Unfortunately, Cityroomz does not offer free parking--just free internet. Is there something more I can help with? Sentence4: I am planning a trip in cambridge Sentence5: No thank you. Sentence6: That's leaving from Cambridge, right? If so, then yes, book me one seat, and give me the reference number, thanks! Sentence7: Okay. I can help you find a restaurant or hotel, look for tourist information, book a train or taxi. How may I help you ? Sentence8: Thank you so much for calling. Sentence9: TR5517 will leave at 08:01 and arrive by 09:01. Would you like to book seats? Sentence10: I'm also looking for information on a hotel called cityroomz. Sentence11: I need a train going to Broxbourne that leaves after 8:00 on Monday Sentence12: I have it be sure to give me your preferences and we can start booking Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User