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

[EX Q]: Sentence1: Thank you for using our system today! Sentence2: I am coming to cambridge and heard about a bed and breakfast called finches. Sentence3: Yes, I would like to arrive before 5:00 PM. Sentence4: It is a lovely guesthouse on the west end boasting cheap prices and a 4 star rating! Would you like their address or phone number perhaps? Sentence5: I actually would like to book the hotel for 7 people starting on Tuesday for 3 nights. Sentence6: I'll be departing from cambridge and going to norwich. Sentence7: I apologize, I actually need to leave after 16:30 Sentence8: No problem, but I'm afraid there are no trains leaving after 16:30 and arriving by 17:00. Might I suggest TR7047, which leaves Cambridge at 16:36 and arrives in Norwich by 17:55? Sentence9: Is there a time you would like to arrive before? Sentence10: Can you also help me find a train on Fridya? Sentence11: Train TR7747 leaves at 15:36 and arrives in Norwich at 16:55. Would you like me to book you tickets? Sentence12: Thank you, no that will be all. Sentence13: OK, the booking for successful. The total is 17.6 GBP and the reference number is MIMOPEN1 . Is there anything else I can do for you? Sentence14: Yes, that sounds great. Please book that for me. Sentence15: I was able to book your party of 7 at Finches bed and breakfast for 3 nights. Your reference number is 4R76GWVJ . Can I help you with anything more today? Sentence16: Of course. There are many available Friday. Where will you be traveling to and from? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thank you, and have a nice day! Sentence2: How about the Alexander bed and breakfast in the town centre? It is cheap and has free parking. Sentence3: I have a Norwich bound train leaving at 18:36, price of 17.60 pounds and traindID of TR7776, would you like me to book it? Sentence4: Yes please, for all seven of us. Sentence5: Is that a 2 star hotel? Sentence6: I'm so sorry, the Lovell doesn't have the availability you're looking for either. Would you like to try to book for a shorter stay? Sentence7: I would like a 2 star hotel. Sentence8: Can you try booking a 1 night stay? I need the reference number if that works. I also need a train leaving Cambridge after 17:45, arriving in Norwich on Wednesday. Sentence9: I have booked your stay at Lovell Lodge. Your reference number is ATYKA57C . Would you like me to buy tickets train tickets also? Sentence10: Yes. Thank you very much. Sentence11: There are 2 moderately priced 2 star hotels on the North side of town: the Ashley Hotel and the Lovell Lodge. Would you like more information on one? Sentence12: Hi I am looking for a place to stay with free parking in the cheap price range. Sentence13: What about moderately priced places with 2 stars? Sentence14: And would that be for the seven people that are staying at the hotel? Sentence15: Not at the moment. Can I have the price and train ID though? Sentence16: Does the Lovell have 3 nights available? Sentence17: Could you book 3 nights at the Ashley for 7 people, please? We'll be arriving on Tuesday. Sentence18: No, I think that's all. Thanks! Sentence19: Is there anything else I can help you with? Sentence20: The Alexander B&B is a 4 star hotel. There are no cheap hotels with 2 stars that offer free parking. Do you want to broaden your search? Sentence21: I'm sorry, it isn't available for 3 nights. Would you like to arrive on a different day or stay for less time? Sentence22: We have several locations that suit your needs, would you like a 4 star hotel? Or is there any other accommodations you'd like to narrow down the list? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I need to book a train from stansted airport to cambridge, can you help me? Sentence2: I reserved you 6 seats on the TR5754. It leaves at 11:24. The total fee of 60.59 GBP is payable at the station. Your reference number is : 1IBJMMM8 Sentence3: Yes, what day will you be traveling? Sentence4: No problem. Have a great day and trip. Goodbye. Sentence5: monday, after 11:15 Sentence6: Can you reserve 6 tickets on the next train after 11:15? Sentence7: There are 13 trains that match. Shall I reserve any tickets for you? Sentence8: Great sounds perfect!! Thank you so much for all your help. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]:
Answer: (A) User