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

[EX Q]: Sentence1: No, that's all I needed. Thank you for your help - goodbye! Sentence2: I will take the one that arrives at 15:08. can you make me a booking for 8 people on Wednesday? I will need a reference number. Sentence3: The train should depart from Cambridge on Wednesday and headed for Stansted Airport. It should arrive by 15:15. I would also like you to make a booking for 6 people. Sentence4: I'm looking for a train. Sentence5: I have two trains that would suit you. One arrives at 14:08 and the other at 15:08. Do you have a preference? Sentence6: I have 2,828 trains with different routes, to help narrow it down, where will you be departing/arriving, and what day/time? Sentence7: It was a pleasure to assist you. Please use us again for your future needs. Have a good day. Sentence8: Sure thing! I've booked the train for 8, and your reference number is I62H3VUY . Is there anything else I can do for you today? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Cambridge artworks is wonderful! They are located at 5 greens road cb13ef. There phone number is 01223902168. Sentence2: Yes, there are 4 museums. Three are free and one has a 5 pound entrance fee. Are you looking for a gallery? Sentence3: What do you recommend? Sentence4: Can you help me find a place to go in the east? Sentence5: Thank you. That's all I needed. Sentence6: I'm also looking for a place to eat. I don't mind where, but I want an expensive chinese place. Sentence7: Ok. I booked a taxi for you. It is a blue audi and the contact number is 07155610417. Sentence8: You're welcome, goodbye! Sentence9: A recommendation would be fine. Can I get the area they're in and post code? Sentence10: I'd also like to book a taxi between the two places. I'd like to leave the restaurant by 2:30 Sentence11: There are 9 options that fit your criteria. Would you like a recommendation or would you like to narrow it down further? Sentence12: We have 5 very nice attractions in the east, do you have an idea of type of activity that would best match your needs? Sentence13: I recommend yu garden. It is located in the east. The address is 529 Newmarket Road Fen Ditton. Postcode cb58pa. Sentence14: Is there a museum I could go to on that side of town? If so, please provide phone number, address, and postcode. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Train ID is TR6357. Would you like to book ? Sentence2: The earliest train leaves at 5:01. The latest train leaving by 13:00 would depart at 12:01. There is also one that leaves at 13:01. The trains run every hour. Sentence3: I'm looking for a train to broxbourne. Sentence4: Is there a time you would like to get there by ? Sentence5: Where would you like to leave from, and what day and time would you like to travel? Sentence6: I'm going to be leaving from Cambridge. I need to leave on Tuesday by 13:00. Sentence7: I don't have an arrival preference. Sentence8: Actually, I'd like to arrive by 13:00. Could you give me the train ID for the train arriving closest to that time? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]:
Answer: (A) User