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

[EX Q]: Sentence1: I leave on Tuesday and need to arrive by 11:30. Sentence2: I need a train that goes to Cambridge and departs from Bishops Stortford. Sentence3: I would recommend the lensfield hotel. It's a 3 star hotel in the south. Would you like more information or do you want to go ahead and book a room? Sentence4: The TR0635 leaves at 09:29, tickets cost 10.10 pounds and the duration of the journey is just 38 minutes. Would you like me to book you a seat? Sentence5: What time does the train depart? What is the price and total travel time? Sentence6: No but I also need a place to stay that should be in the expensive price range and should include free wifi. Sentence7: Nope, wherever you recommend will be great. THanks Sentence8: We have 5 hotels that meet your criteria. Is there a particular area of town you would like to stay in? Sentence9: Yes can you please do that for me? Sentence10: No, that will be all. Thank you! Sentence11: How many people should I book this for? What day? How many days will you be staying? Sentence12: ok, the booking was successful. Reference number is : N9Y9Q569 . can i help with anything else? Sentence13: Enjoy your stay. Sentence14: Book it for 8 people and 4 nights. We will be checking in on Thursday. Sentence15: What day will you be departing and time? Sentence16: Ok, the TR0635 arrives at 10:07. Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Unfortunately, no. La Margherita is an italian place. And, Thanh Binh serves vietnamese. Sentence2: Would you like for me to make you a reservation? Sentence3: Thank you for using the Cambridge Town Info Centre Services! We hope you enjoy your time in Cambridge Sentence4: yes, I want to book a table for 6 people at 12:00 on sunday. Sentence5: Booking was successful. The table will be reserved for 15 minutes. Reference number is : H0BFXWTP . Can I help you with anything else today? Sentence6: Yes, book that for 6 people. I would also like the reference number. Sentence7: Where would you like to go to? Sentence8: Thanh Binh would be perfect. Sentence9: Certainly! There are two great restaurants that meet your criteria. The first in La Margherita and the second is Thanh Binh. Would you like more information on one of them? Sentence10: Your booking was successful. The total fee is 113.28 GBP, which is payable at the station. Your reference number is A5ZWGBQ3 . Sentence11: Yes, could you find me a train from ely that same day? Sentence12: thanks so much you have been very helpful Sentence13: Does it serve creative food? Sentence14: TR3207 will arrive by 07.51. Should I book it? Sentence15: Can you help me find a cheap restaurant in the west side of town? Sentence16: I would like a train to Cambridge, arriving by 09:45. Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I have made that booking for you. Your reference number is E31YXTP1 . Sentence2: That will be it. Thank you very much for your time. Sentence3: Thank you, have a good day. Sentence4: I am looking to book it for 4 nights for 5 people starting Tuesday. Sentence5: No problem. Just give me a date, how many days, and how many people to accommodate please! Sentence6: I want to book the el shaddai hotel. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System