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

[EX Q]: Sentence1: Could you tell me more about it? What is its price range? Where is it located in the south? Sentence2: I'm sorry that date and time slot is already full. Would you like to try a different date/time? Sentence3: It is expensive and the address is 15-17 norman way, coldhams business park Sentence4: what about 4:30 on tuesday? Sentence5: There is one Mexican restaurant in the south. The Chiquito Restaurant Bar. Would you like me to book it for you? Sentence6: Thank you, that is all I need today. Sentence7: I am trying to find a restaurant in the south of the city that serves modern American food. Sentence8: I was able to book a table for 1 at 16:30. Your reference number is P62404I5 . Sentence9: I didn't find any modern American restaurants in the south end. Are you open to other areas? Sentence10: Sounds delicious, could you book a table for 1 at 17:30 on Tuesday? Sentence11: You are welcome. Goodbye. Sentence12: What about a restaurant there that serves mexican food? Sentence13: It is in the expensive price range and is located at 2G Cambridge Leisure Park Cherry Hinton Road Cherry Hinton cb17dy Sentence14: Great! Can you also tell me the address and price range for the Express by Holiday Inn Cambridge? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Enjoy your day. Good bye. Sentence2: The address is colville road, cherry hinton. Sentence3: That is all I need, thank you. Sentence4: Sure, I can get you aboard a 15:21 arriving at 17:06. Would you like me to book a seat aboard TR9839? Sentence5: Sounds good. What is the postcode, please? Sentence6: You're welcome! Have a great day! Sentence7: Of course. The Cherry Hinton Village Centre has multiple sports in the east end of town. Sentence8: There are quite a few running all day to many different stations. Where would you like to go? Sentence9: I need a train leaving cambridge on thursday. Sentence10: I would like to go to Leicester and get there by 18:45 Sentence11: The postcode is cb19ej. Is there anything else I can help you with? Sentence12: Good bye. Sentence13: Thank you for using our service. have a good day! Sentence14: Oh wait! Before you go, can you give me some information on the cherry hinton village centre? Sentence15: Yes, may I have their address, please? Sentence16: Not right now. Thanks for the information though! Have a great day! Goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Nope, that should be all for today, thanks! Sentence2: You're welcome. Have a good time! Sentence3: Can you book me a taxi as well? Sentence4: I want to go from the Allenbell to the Cafe Jello Gallery. I want to leave the museum by 23:00. Sentence5: Sure, what time would you like to leave and where from? Sentence6: Does it also have free wifi? Sentence7: There's 7 museums in the west and I highly recommend the cafe jello gallery. Would you like more information? Sentence8: Hello, i'm looking for a cheap hotel in the cambridge area close to local attractions. I don't need internet or parking. Can you help? Sentence9: The cafe jello gallery is at 13 magdalene street, postcode cb30af. Phone number 01223312112 Sentence10: I don't show any parks in the west. Would you like to try another attraction? Sentence11: That is perfect, I was looking for free parking as it was. Sentence12: its a 4-star. from which day should i book? Sentence13: Yes it does have Wifi. Would you like me to book you a room? Sentence14: Thank you that's all i need! Sentence15: All the lodging I have found offers internet and parking. Would that be ok? Sentence16: no problem. I have changed your booking. Your new taxi would be a black volkswagen and its contact number is 07276925880. Is that everything? Sentence17: Can you specify your destination? Sentence18: Can you look for a nice museum instead? Sentence19: I'm looking for a place in the cheap price range with free parking. Sentence20: I want to leave the museum by 23:00. Sentence21: Is there a particular part of Cambridge you are hoping to stay in? Sentence22: Yes, book one night please. What is the star rating by the way? Also what parks are in the west area? Sentence23: Actually, I'm not quite ready to book yet. But I am looking for parks in the west part of town. What are my options there? Sentence24: I'd like the postcode and phone number of that gallery please. Sentence25: Booking completed! The booked car type is a yellow skoda and your contact number is 07590574334. Can I help you with anything else? Sentence26: I think the Allenbell would be a good fit. Would you like a reservation? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System