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

[EX Q]: Sentence1: Your table is booked (ref# SCHAG4OI). What time do you need that taxi? Sentence2: The phone number is 01223240089, and the post code is cb17sr. Is there anything else I can assist you with? Sentence3: Thanks. That is all for now. Sentence4: Aylesbury odge guesthouse,I will book it for you,is there anything else I can do for you ? Sentence5: Are any a guesthouse? Sentence6: Okay. Please call us if we can help you further. We hope you enjoy your stay. Sentence7: the good luck chinese food takeaway is great. Shall i book it ? Sentence8: No I just need you to recommend one for me. Sentence9: I don't need you to book it, I just need the phone number and post code please. Sentence10: Hello, I am looking for a place to stay that has free parking in the South area. Can you help me with that please? Sentence11: What time would you like to dine, and how many will be in your party? Sentence12: Thanks, also looking for a restaurant in the same part of town in the expensive range. Can you recommend one? Sentence13: I'd like it to arrive in time to get us there before 12:15. Sentence14: Yes I have 3 guesthouses matching your criteria. Would you like to book one of them? Sentence15: Your black ford taxi has been booked and your contact number is 07103139053. Sentence16: I have four options ranging in price from cheap to expensive ranging in from 3 to 4 stars. Sentence17: There will be 6 of us. We'd like 12:15 on Saturday please. Sentence18: Please book the restaurant and I also need a taxi. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thank You good bye Sentence2: Yes. Kymmoy is an expensive restaurant serving asian oriental food in the centre part of town. Sentence3: Thank you. May I have their phone number? Sentence4: Their number is 01223 311911. Will that be all today? Sentence5: Yes, thank you. Sentence6: There is not matching places that fits your request. Can i help you with something else? Sentence7: Are there any Asian Oriental restaurants in that price range? Sentence8: I'd like to find an expensive restaurant that serves venetian food. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I will book that for you now. Sentence2: Okay. I have booked one ticket for you. The reference number is EHRSRM7K and it will cost 4.4 GBP. Sentence3: I can help you with that. How early do you want to leave because we have trains running as early as 5:35 Sentence4: Thank you for using our system! Sentence5: How many tickets will you need? Sentence6: No, that is all. Thank you so much. Goodbye Sentence7: i want to arrive by 16:30 if possible. Sentence8: I need to see some train times for Wednesday. Sentence9: The TR2211 will leave Ely Wednesday arriving at 15:52. Would you like to book that one? Sentence10: Thank you and I need a reference number Sentence11: Yes book that for me thank you Sentence12: I need to depart from ely and arrive by 16:30. Sentence13: There are 404 trains running on Wednesday, what point of departure and point of arrival are you interested in? Sentence14: Just one ticket and thank you Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]:
Answer: (B) System