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

[EX Q]: Sentence1: Okay, the TR8944 leaves at 15:39 and arrives by 17:07. Would you like me to book tickets for you? Sentence2: There are 10 trains leaving fro Liverpool Street on Thursday. Did you have a departure time in mind? Sentence3: Okay I have booked you and your reference number is WLUOQKEV . Sentence4: rosa's bed and breakfast is in the cheap price range Sentence5: I'm looking for a train departing from london liverpool street leaving on thursday. Sentence6: Do you need a taxi? Sentence7: Goodbye, and thanks again. Sentence8: Yes, I don't want to leave for Cambridge until 15:00 at the earliest. Sentence9: Sure thing. Thanks for letting us help you today! Sentence10: Thank you. I also need a hotel in the south. Sentence11: then thanks for inquiring with us. Sentence12: I don't need a taxi, thanks for asking Sentence13: No price range but I do want a 4 start. Sentence14: Yes, for 6 people. Sentence15: What price range are you interested in? Sentence16: That sounds great. I'll need a reservation for 6 people for 4 nights on Thursday. Sentence17: I've gone ahead and booked that for you. Your Reference number is : EUZ34KY9 . Is there anything else I can assist you with today? Sentence18: No, that takes care of everything I need. Thanks! Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I would like a restaurant serving swedish food in the north part of town. Sentence2: I don't care. Sentence3: What is the address, phone number, and price range? Sentence4: I'm sorry but there are no Swedish serving restaurants in that area. Would you like to expand your search? Sentence5: Thank you goodbye. Sentence6: City Stop Restaurant is an expensive restaurant on the North side of town. Sentence7: The Royal Spice restaurant has a cheap price range. Sentence8: Is there a restaurant on the North side of town? Sentence9: How about indian food? Sentence10: it's address is Victoria Avenue Chesterton, and phone number is 01733 553355. Sentence11: There are several restaurants in the north part of town. Do you have a preference of price range or type of food? Sentence12: Good bye. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: We have many hotels that fit your needs, is there a specific area you're looking at? Sentence2: We have TR2475 that leaves cambridge at 07:50 and arrives ely by 08:07. Will that work for you? Sentence3: It's in the north area and they do have parking. Sentence4: Thanks, that's all i need! Sentence5: Are you sure you don't need me to book your hotel for you? Sentence6: Do they have free parking? What area is it located? Sentence7: Acorn guest house fits your needs. Would you like me to book your stay? Sentence8: something that has free wifi Sentence9: I need to find a guesthouse with a moderate price range. Any places to stay? Sentence10: That has been booked. Reference number is : FSUGM4NQ . Sentence11: Can you help with transit information? I need to go to ely by train on Sunday and need to arrive by 09:00 departing cambridge. Sentence12: Yes, that sounds perfect. Can you purchase 7 tickets for me please? Sentence13: Excellent. I also need a train to ely. Sentence14: No problem. Good bye! Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]:
Answer: (A) User