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 Gonville Hotel located in the centre area of town? Sentence2: Between $100-$300 per night. Sentence3: I have several available. What is your price range? Sentence4: Ok, I have several hotels. Any particular location? Sentence5: Location doesn't really matter as long as there's free parking available. Sentence6: What is their postcode? Sentence7: I need a place to stay with free wifi. Sentence8: Their postcode is cb11Iy, address gonville place, phone 0122336661 they have wifi and free parking too. Would you like me to book this for you? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: You're welcome and thanks for using our help desk. Goodbye. Sentence2: Thanks for the recommendation. That's all the help I need today. Sentence3: I'm looking for the entrance fee for Castle Galleries. Sentence4: Yes, i would like help locating an attraction. Sentence5: OK - what type of attraction are you looking for, and in what part of town? Sentence6: Their entrance fee is free. Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Booking was successful, the total fee is 50.5 GBP payable at the station . Reference number is : GAF920N6 . Is there anything else I can help you with? Sentence2: No there is nothing else today. thanks, bye Sentence3: Yes. Please reserve it for 5 people on Friday at 13:45. Sentence4: Hi, I'm looking for a European restaurant. Sentence5: Unfortunately, I am unable to book it right now. Sentence6: Yes, can you book it for 5 people and get me the reference number? Sentence7: May I get some more information from you to ensure we get you on the best train possible for you, the last bit of information I need is where you would like to arrive via train. Sentence8: Booking was successful. The table will be reserved for 15 minutes. Reference number is : DJ7MZL41 . Is there anything else I can help you with today? Sentence9: Of course, my destination will be stansted airport. Sentence10: Is this actually located in the centre area? I just want to make sure. Sentence11: Great. I'll also need to find a train out of cambridge. I need to leave sometime after 13:45. Sentence12: You're welcome and enjoy your stay. Sentence13: Oh. Could you please try again? Sentence14: The Eraina is an expensive European restaurant located at Free School Lane City Centre. Sentence15: I have train TR1316, It arrives at 15:08. Would you like me to book it for you? Sentence16: Yes it is located in the centre area, shall I reserve a table for you? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User