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

Sentence1: Yes, there are 2 in the north, 1 in the east and 1 in the centre. Which would you be interested in? Sentence2: Train TR8464 leaves at 11:21 and arrives at 12:10. Would you like to book that one? Sentence3: Actually none of the pools in our database have an entrance fee listed. Is there anything else I can help you with? Sentence4: Im leaving from Cambridge and going to Stevenage. Sentence5: I'm looking for a train to stevenage, leaving on Sunday. Sentence6: Do you have entrance fees for any of the others? Sentence7: No, I need to leave some time after 14:30, and I'll be traveling to Cambridge. Sentence8: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence9: No thank you that is all the information I need today. Sentence10: Before we do that are there any attractions that feature a swimming pool in town? Sentence11: There are many trains at that time, where are you leaving from? Sentence12: What is the name, entrance fee, and phone number of the one in the center? Sentence13: the 1st train out of cambridge going to stevenage is at 15:21 arriving at 16:10. shall I get a ticket for you? Sentence14: The name is Parkside Pools. The entrance fee is not listed in our database, but you could probably get it by calling them at 01223446100. Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: Your booking was successful! Your reference number is EV4ADBI9 . Sentence2: I need it for Sunday. Sentence3: Yes. Let's book it. Sentence4: I would like it to be in the west. It doesn't matter if it has free parking or not. Thank you! Sentence5: There are four three star guest houses. Is there an area of town that interests you the most? Sentence6: Train TR3154 leaves cambridge at 13:06 and will arrive at peterborough at 13:56 on Monday. Would you like me to book a ticket? Sentence7: I am looking to stay at a guesthouse that has a 3 star rating. Sentence8: ok for how long and how many people please Sentence9: I want a train that goes to peterborough and leaves after 13:00 Sentence10: Does it leave on Monday? Sentence11: There is the hobsons house. Would you like me to book it? Sentence12: For 3 days and 2 people,I need a confirmation number too Sentence13: and what day do you need the reservation for? Sentence14: The next train is the TR0545 leaving cambridge at 13:06. Would you like me to book it or more information? Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User

Sentence1: TR0768 leaves at 19:40, arrives by 20:08. The duration is 28 minutes. Is there anything else? Sentence2: I'd like to book the Alexander B and B for 6 people, 5 nights, and starts on Thursday. Can I have a reference number, please? Sentence3: I'm also looking for a train on tuesday and leaving after 19:30 Sentence4: Yes, alexander bed and breakfast is a guesthouse located in the centre. It is in the cheap price range. Is there anything else you need to know? Sentence5: TR0768 leaves at 19:40. Does that work for you? Sentence6: I can look into that for you - where would you like to go? Sentence7: Where I'd like to go is probably different than where I have to go, but I plan on going to stansted airport. Sentence8: No. I am all set. Sentence9: What is the travel time? Sentence10: Have a great day then! Sentence11: i'm looking for a hotel called alexander bed and breakfast Sentence12: Done! Your reference number is 45NR6JNN . Do you need help with anything else? Question: Who has spoken the sentence 3? (A) User (B) System

Answer: (B) System