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

[EX Q]: Sentence1: that is great! thank you for all your help. Sentence2: I need help finding an expensive restaurant in the centre, can you help me please? Sentence3: Thank you for calling and have a great day. Sentence4: I have found the backstreet bistro and the slug and lettuce, which one would you like more information on? Sentence5: Yes both are in the expensive price range Sentence6: I'd love to help. We have 33 expensive restaurants. Do you have a cuisine you'd prefer? Sentence7: Do anything of them serve gastropub food? Sentence8: I want to book a table for 4 people at 16:15 on a Tuesday please. Sentence9: Can I have the munber in your party and the day and time you would like to book? Sentence10: Great! Here is the address, 34 - 35 Green Street. Sentence11: Okay I was able to book you then at The Slug and Lettuce and your reference number is FSOF58OO . Sentence12: Yes, I'm looking for gastropub food. Sentence13: Thank you so much. That is all I need. Sentence14: Any one will be fine. I need the reference number please after its booked. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I do not care about the area but I would like it to be expensive. Sentence2: How about the Gonville Hotel which is centrally located? It has internet and is expensive. Sentence3: I found 5 hotels matching your request. I would recommend Huntingdon Marriott Hotel located in the west. It has a 4 star rating. Sentence4: Will you be needing a reference number? Sentence5: On what day will you be checking in? Sentence6: 4 people will be staying Sentence7: I also need a place to stay? Sentence8: Your table will be reserved for 15 minutes. Your reference number is GDZZ5T1Y . Can I assist you further? Sentence9: That is all, thanks. Sentence10: Booking was successful. Reference number is : M6FRXJOV . Sentence11: I have many to choose from. Do you have a preference for internet or parking? Sentence12: Alright! How many people will be staying starting what day? Sentence13: There are 11 European style restaurants. What price ranges are you looking for? Sentence14: Yes, I would like it to have internet. Sentence15: That sounds perfect. Let's book it. Sentence16: There are 33 hotels to choose from. Can we narrow this down? Are you interested in a particular part of town or specific price range? Sentence17: Expensive price range. Please book it for 4 people at 18:15 on Monday Sentence18: Can you help me find some european food in Cambridge? Sentence19: How about price range? The hotel should also be very expensive. I won't settle for less and neither will Fi-Fi. Sentence20: I will be staying on Monday. Sentence21: Yes I will definitely need that. Sentence22: Great. If you need help in the future, please contact us. Enjoy your stay. Question: Who has spoken the sentence 16? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Sure, I adjusted that for you, your booking was successful and the ref number is RP2PZDYV . Sentence2: I need to leave after 21:15 on saturday Sentence3: Sure! What day will you be travelling? Sentence4: TR0925 leaves cambridge at 21:00 and arrives in cambridge at 21:51. The price is 18.88 pounds. Would you like me to book it for you? Sentence5: That works I think. Sentence6: Would you like to book a reservation at this time? Sentence7: welcome and have a great day Sentence8: No preference on price and it doesn't have to include parking. Sentence9: Yes. Please book me 2 tickets and provide me a reference number. Sentence10: Yes, I need it for 2 people, staying 3 nights, starting wednesday Sentence11: Great, thank you! Sentence12: Would I be able to get a train from Cambridge to London King's Cross? Sentence13: I'm also looking for a place to stay in the north. I'd like it to have a rating of 4 stars. Sentence14: have a great day too Sentence15: I have the acorn guest house located at 154 chesterton road. Sentence16: Your hotel has been booked! Sentence17: Your reference number is VYR91INX . Is there anything else I can help you with? Sentence18: I need a hotel to stay in for the same group of people just for 1 night though, and a reference number too please Sentence19: thanks for using our service. Sentence20: I have 8 different guesthouses in the north. Do you have a preference on price? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]:
Answer: (A) User