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

[EX Q]: Sentence1: Yes, please book this. Sentence2: I found 4 restaurants, would you like to try Cotto? Sentence3: Thank you, can I also get a train leaving petterborough and arriving by 11:15 Sentence4: That's all I need, Thank You. Sentence5: Sure, can you try to get a table for 8 people at 17:00 on Tuesday? Sentence6: Okay... how about British food? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : IAUXALYD . Sentence8: I just need to make sure I arrive in cambridge by 11:15 please. Sentence9: I would like to try Jamaican food. Sentence10: Unfortunately I can't find any Jamaican restaurants. Is there another type of food you'd like to try? Sentence11: Absolutely. How many tickets would you like to be booked? Sentence12: There are 21 different restaurants in that area matching your price range. What kind of food are you in the mood for? Sentence13: I'm looking for a moderately priced restaurant in the center of town. Sentence14: Sure thing! The reference number is S4FM08GE . See you! Sentence15: There is a train that leaves at 10:19 and arrives at 11:09. Would you like to book it? Sentence16: there are eleven trains that match that criteria. What time would you like your departure time to be? Sentence17: Yes, Tuesday, the same day as the restaurant booking, can I please get a departure time as well? Sentence18: Before going further I would just like to confirm you'd be leaving on Tuesday, is that correct? Question: Who has spoken the sentence 16? (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

[EX Q]: Sentence1: I don't know yet. Do you know how much it will cost? Sentence2: Nah. Can you just book me a table at your favorite one? 2 people at 20:45 on Monday, please. Sentence3: Thank you very much for the help. Good bye! Sentence4: Yes, 14:45. Could you give me a departure time that meets my criteria? Sentence5: I would like the reference number if it s successful please. Sentence6: The reference number is 2DNK6C4B . Sentence7: Any arrival time in mind? Sentence8: How about 19:45 and give me a reference number Sentence9: Could you be more specific on where you are departing from and what day you want to travel? Sentence10: I was not able to book a table at 20:45. Would you like to try another time? Sentence11: Thank you. Goodbye. Sentence12: What train should I take to get to Cambridge by 14:45? Sentence13: One moment while I try to make the reservation for 19:45. Sentence14: There are several choices. Do you have a specific price range? Sentence15: Tickets are 16.60 pounds Sentence16: Depart from london liverpool street and should leave on monday. Sentence17: Okay. I am also looking for a restaurant. Are there any restaurants in the centre that serve asian oriental food? Sentence18: Yes, TR7040 leaves at 11:39 and arrives by 13:07. Would that work for you? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System