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

[EX Q]: Sentence1: How about the Alexander bed and breakfast in the centre? It is a cheap 4 star guesthouse with free internet and wifi. Sentence2: That sounds like it might work. Could you check availability for two people this weekend? Sentence3: Does this place include free parking? Sentence4: I am unsure at this time. Sentence5: I am glad to help. Have a nice day. Bye. Sentence6: I live in the centre of town and want to see if I can find a reasonable room for my parents to stay while they are visiting. Sentence7: Okay, would you like some more information about that hotel? Sentence8: You have been very helpful. I have everything I need, thanks. Bye Sentence9: The address is 56 saint barnabas road. Sentence10: What day are they arriving, and how many nights are they staying? Sentence11: The alexander bed and breakfast is a cheap, 4 star guesthouse in the centre area, It has wifi and parking. Does this fit your needs? Sentence12: Can you tell me what the address is? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I believe that's all I need. Thanks! Sentence2: It is an expensive restaurant on the west side of town. Would you like me to reserve a table for you? Sentence3: Yes I have many options for you. How about the Tandoori Palace? Sentence4: I'm looking for an Indian restaurant in the west. Sentence5: That might work. What is the price range of Tandoori Palace? Sentence6: Sure, it is located at 68 Histon Road Chesterton in the cb43le post code. Can I help with anything else today? Sentence7: You are welcome. Have a nice day. Bye. Sentence8: No that's OK, but could you give me their address and postcode please. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: That's a lovely 4 star guesthouse in the south part of town. What would you like to know? Sentence2: Yes, I need some information on rosa's bed and breakfast. Sentence3: Thank you for using our service today! Sentence4: No that's it, thank you for your help. Sentence5: I want to leave from Bishops Stortford and go to Cambridge. Sentence6: Yes please book it for the same group of people and 2 nights starting from the same day. Sentence7: Hello, I am looking for a train that leaves on Friday after 10:00. Sentence8: Booking was successful. Reference number is : GXVPCRC1 . Is there anything more I can help with? Sentence9: TR6834 departs Bishops Stortford at 11:29 arriving by 12:07 in Cambridge. Does this work for you? Sentence10: The booking was successful and your reference number is 5636CNX2 . Please pay 70.7GBP at the station. Is there anything else? Sentence11: That will work great. Could you please make a booking for seven people? Sentence12: Ok, and where will you be leaving from and heading to? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]:
Answer: (B) System