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

[EX Q]: Sentence1: Can you verify that the hospital has a transplant high dependency unit? Sentence2: Can you help me find a hospital nearby? Sentence3: Yes, it does. Here is the unit's phone number: 01223216811. Do you need any other information? Sentence4: I would like the address and phone number please. Sentence5: No that is everything. Thank You Sentence6: Sure, the phone number is 01223245151 and the address is Hills Rd, Cambridge. Sentence7: The nearest hospital to you is at Hills Rd, Cambridge. would you like their phone number? Sentence8: Alright sounds good. I hope everything is okay. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: The address for that is 6 trinity street. Sentence2: I don't need to make the reservation now. Thank you though. I would like the address for Cambridge Contemporary Art please. Sentence3: Can you help me find a train coming from cambridge leaving on thursday? Sentence4: How many tickets please? Sentence5: I want to arrive by 21:30 if possible. Sentence6: Yes I have many options. What time would you like to leave or arrive by? Sentence7: Train TR3255 is arriving at 21:06,is that okay for you? Sentence8: Thanks for using our service today, glad I was able to assist you. Hope you have a great day. Sentence9: That could work for me. Sentence10: thank you, that will be all. good bye. Sentence11: I will be going to Leichester. Sentence12: There are 202 trains departing Cambridge on Thursday. Where do you plan to head to that day? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I don't need to book right now. I just need the trainID and the ticket price, please. Sentence2: ADC Theatre is located on park street. I am unsure of the entrance fee. Sentence3: I would like to leave on Sunday please. Sentence4: Alright that's fine. Can I get a train that departs from London Liverpool Street and arrives there by 19:30? Sentence5: Is this for today? Sentence6: What is the entrance fee and address of the ADC Theatre? Sentence7: Sure, the price for TR8260 is 13.28 GBP per ticket. Is there anything else I can help you with today? Sentence8: I'm looking for a theatre in the center of town, please. Sentence9: There are 4 theatres located in the centre of Cambridge. They are ADC Theatre, Cambridge Arts Theatre, Mumford Theatre and The Cambridge Corn Exchange Sentence10: No thank you, that will be all. Sentence11: Okay, have a good day. Goodbye. Sentence12: There are 7 trains to cambridge that will arrive before 19:30. TR82260 arrives at 19:07 and departs at 17:39.Would you like to book this train? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]:
Answer: (A) User