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

Sentence1: I'm departing from Norwich and want to arrive by 13:00. Sentence2: Yes, I will need a train to cambridge on thursday. Sentence3: You are booked for 7 people, 5 nights starting thursday. Your reference number is ZFREK5SQ . May I help you with anything else today? Sentence4: the Kirkwood House is in the north and it sports a four star rating. It has internet and parking and the price range is moderate. Would you like to book? Sentence5: You're welcome. Have a great time! Sentence6: The travel time of that train is 79 minutes. Sentence7: thanks for your help you have been great! Sentence8: That sounds perfect. Can you reserve it for seven people? Sentence9: Where will you be departing from? Sentence10: I'm looking for a particular hotel called the kirkwood house. Where is it, and what other information do you have about it? Sentence11: TR3078 departs at 11:16 and arrives by 12:35. Would you like a ticket? Sentence12: not right now, what's the travel time on that ride? Sentence13: Sure, I can book it for you. What day did you want to arrive and for how many days? Sentence14: 5 nights starting Thursday. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: Not right now, but could I please get the address for the hotel? Sentence2: Certainly. All Saints Church is in postcode cb58bs. Can I help you with something else today? Sentence3: The Cambridge Belfry is located at back lane, cambourne. The phone number is 01954714600 and postcode cb236bw. Is the anything else I can help with? Sentence4: Thank you. Have a nice day as well. Good bye. Sentence5: Yes please, we'll be needing somewhere to stay the night. What can you tell me about the Cambridge Belfry? I've heard it's pretty nice, is that true? Sentence6: It is four stars. What else would you like to know? Sentence7: Hello i'm looking for places to go in cambridge please. Sentence8: No that's it, thank you. Sentence9: Does it have free parking? Sentence10: The Cineworld Cinema is located south at Cambridge leisure park, clifton way. Is there a specific activity you had in mind? Sentence11: I hope you enjoy your stay. Have a nice day. Sentence12: The Cambridge Belfry does have free parking. Would you like me to book it for you? Sentence13: I need a place in the centre. Sentence14: All Saints Church is in the centre area. The entrance fee is free. Would you like to book that? Sentence15: Yes, can I get the postcode. Sentence16: Have a nice day! Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System

Sentence1: Unfortunately, I don't happen to have a listing that matches your request. Would you like me to try a different price range or cuisine style? Sentence2: You're welcome. Enjoy your meal! Sentence3: No, that's it. Thanks a bunch. Sentence4: I want a restaurant that serves molecular gastronomy food. Sentence5: Yes, there are 3 Chinese restaurants that are in the cheap price range. I would recommend the Golden House. Would you like for me to book you a table? Sentence6: The Golden House is located at 12 Lensfield Road City Centre. Their postcode is cb21eg. Can I help you with anything else? Sentence7: Their phone number is 01842753771. Is there anything else I can help you with? Sentence8: Actually, scratch that, I don't want to book the restaurant. Could you give me the phone number for the Golden House? Sentence9: Can you give me the address and postcode as well? Sentence10: Yes, please book it for around 20:00 for 3 people Sentence11: There are several options available in the town centre. Is there a particular cuisine that you would prefer? Asian, chinese, indian, italian, mediterranean, modern european, portuguese, or spanish? Sentence12: What day would you like to book? Sentence13: I am looking for a cheap restaurant in the centre of town. Sentence14: Are there any Chinese restaurants? Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User