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

Sentence1: Phone is 01223505015 and postcode cb11ln. Would you like me to get you a table? Sentence2: No that's all. Thanks so much! Sentence3: I booked you on TR8399 arriving at 10:07. Booking was successful, the total fee is 17.6 GBP payable at the station . Reference number is : AVBKNMXQ . Sentence4: Thank you very much. Sentence5: I'm looking for an expensive restaurant that serves european food while I'm in Cambridge. Sentence6: Darry's Cookhouse and Wine Shop is located at 40270 King Street at the City Centre. Would you like their phone number? Sentence7: Yes, please, and their postcode as well. Sentence8: You are welcome. Enjoy your stay. Sentence9: No. But I need a train going to Ely. Sentence10: Where are you travelling from and what time? Sentence11: I am departing from cambridge on monday and I need to arrive to Ely by 11:15. Sentence12: You choose one please. I need it for 4 people. Sentence13: Is there anything else I can help you with? Sentence14: I have 3 trains available leaving at 06:07, 08:07, and 10:07. What time would you like to leave? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: I need help, i just been the victim of a robbery. Sentence2: You are most welcome! Sentence3: Sure, here it is: Parkside, Cambridge. Sentence4: I am not hurt but I need to get in touch with the police, can you send me the address? Sentence5: Are you hurt? Sentence6: Thank you for your help Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User

Sentence1: TR0497 arrives in Cambridge at 12:23. Would you like to purchase tickets? Sentence2: It has been my pleasure. Please feel free to contact us again if you require any further assistance! Sentence3: I'd like to find a train leaving on Friday to Cambridge. Sentence4: Yes please, book 4 tickets for me. Sentence5: I will leave from Birmingham new street, and arrive by 13:15 if possible. Sentence6: Thank you very much. It looks like i am all set. Have a nice day. Sentence7: Booked, reference number is T610U5HK . You pay 300.39 GBP at the station. Your train leaves at 9:40. Sentence8: There are 1414 trains heading to cambridge do you have a location you're leaving? Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System