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

[EX Q]: Sentence1: Where will you be travelling to? Sentence2: Yes but I need that to be booked for 3 people. I would like the reference number please. I also need a place to stay as well. Sentence3: Sure thing, I would suggest this one acorn guest house. Sentence4: I will be traveling to Leicester and would like to arrive before 21:15. Sentence5: I would like a 4-star guesthouse in the north in a moderate price range. Sentence6: Great can you book that for me from Sunday for 2 nights for 4 people. Sentence7: I would like to arrive by 21:15. Sentence8: When could you like to arrive by? Sentence9: Your booking was successful. Your reference number is 7ZJ4CTTG . Will that be all for today? Sentence10: Booking was successful, the total fee is 113.4 GBP payable at the station. Your reference number is ABKFF3SH . What type of place are you looking for? Sentence11: I'm looking for a train that leaves from Cambridge on Tuesday. Sentence12: I have the TR8207 that will arrive by 21:06. Would you like me to book that for you? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: yes, it is perfect Sentence2: Alright, there about 30 or so hotels that would work. Did you prefer a certain area or price range? Sentence3: It's booked. Reference number is 6JC8SK3S . Your taxi will arrive at 11 it's a red skoda with contact number 07950328037 Sentence4: The guesthouse has 4 stars. The address is 154 chesteron road. The phone number is 01223353888. Would you like for me to book it? Sentence5: I am looking for a place with free parking, Internet is not required. Sentence6: There really isn't any particular star rating I'm interested in. Sentence7: Thank you. Will it take more than 15 minutes to get from the hotel to the restaurant? Sentence8: How does the copper kettle sound? It is moderately priced in town centre and serves british food. Can I reserve a table for you? Sentence9: I'll book the hotel myself, but I would like a restaurant reservation. Someplace moderately priced in the center of town. Sentence10: May I suggest the Acorn Guest House? It's moderately-priced in the north. Sentence11: There are 21 moderately priced restaurants near the centre. Do you have a type of cuisine in mind? Sentence12: There will be 8 of us and I am also looking for a moderate priced restaurant in the center for 11:15 on Saturday. Please send me the reference number. Sentence13: Not really, but a moderate priced restaurant in the centre would be ideal. Sentence14: alright, that narrowed the results down to 21 guesthouses. is there a star rating you are particularly interested in? Sentence15: No. I believe that will be everything. Thank you. Sentence16: Thank you and please contact us again if you have any questions. Sentence17: Please tell me its star rating, phone number and address. Sentence18: What day will you be arriving? I also need to know how many people there will be and how long you will be staying. Sentence19: That's fine. Could you book a table for 8 people at 11:15. I need a reference number. I also need a taxi between both places arriving at the booked time. Sentence20: I don't really have an area or price range in mind at the moment, but I am looking for a place that's a guesthouse. Sentence21: Let's get your hotel booked first. I will need to know how many days you'd like to stay and what day you want to begin your stay please. Sentence22: No, your departure is at 11:00 and you will arive by 11:15. Is there anything else I can assist with you today? Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: okay. cheap is good Sentence2: There are no zero star expensive ones. The low quality ones tend to be on the cheaper end. Would you like me to look? Sentence3: Yes, that would be great. I'll need it booked for 3 nights, 8 people, starting on Sunday. Sentence4: Is there a 0-star place that's also expensive? I'm sort of a glutton for punishment. Sentence5: Thank you, goodbye. Sentence6: Okay, how about The Gardenia that serves mediterranean food? Sentence7: We have 2 cheap guesthouses in the center of town. I recommend the Alexander B&B. Sentence8: Thanks. Can you help me find a guesthouse in the same area? Sentence9: Booking was successful. Reference number is : 8I2TLR4V . Anything else I can help you with? Sentence10: They are a cheap mediterranean place in the centre of town. They are located at 2 Rose Crescent City Centre. Their phone number is 01223356354. Sentence11: Any particular cuisine you'd prefer? Sentence12: I have a cheap guest house in the center, 0 stars. El Shaddai. Shall I book it for you? Sentence13: naw, i'm good thanks Sentence14: Actually, I love trying new things. Im open to new things. What is available? Sentence15: No, that's all I needed today. Thanks for your help! Sentence16: Can you give me more information on the Gardenia? Don't forget the phone number, please. Sentence17: If you need any thing else, let us know. Sentence18: I'm looking for a cheap reastaurant in the centre. Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]:
Answer: (B) System