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

[EX Q]: Sentence1: Not in that criteria, perhaps another area or price range? Sentence2: I'm booking you a table for 5 at 11:00 Saturday at Charlie Chan. What name should I place this under? Sentence3: I want to eat chinese food in the centre. Sentence4: Yes, please try J Restaurant. Asian Oriental food sounds good. Sentence5: I was able to book you into the J restaurant and your reference number is 87G7FWZM . Sentence6: Thank you for your help! That will be all. Good Bye. Sentence7: Booking was unsuccessful. Would you like to find another restaurant? Sentence8: I don't know what I was thinking earlier, we actually have a lot of cheap restaurants in the centre. J Restaurant serves Asian Oriental. Should we try that? Sentence9: How about Charlie Chan? It is a cheap chinese restaurant in the centre. Sentence10: You're welcome, have a great day! Sentence11: Are there any in the same area and price range but not Chinese? Sentence12: Sure. I would like to book a table for 5 people at 11:00 on Saturday. Sentence13: Are there any other cheap restaurants in the area? Sentence14: Book it for XXXX, can I please get a reference number? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Yes, please. For 5 people at 14:00 on monday. Sentence2: The camboats are located in the east, how's that? Sentence3: I do not have information on the fee. Sentence4: Ok, thank you. I'm also looking for a restaurant called don pasquale pizzeria. Sentence5: Your booking was successful with reference number 1RF57JD7 . Oh, by the way, your table will be reserved for 15 minutes. Enjoy! Sentence6: Have a lovely stay in Cambridge! Sentence7: Thank you for the reference number. Goodbye! Sentence8: That might be good. What is the entrance fee? Sentence9: Don Pasquale is in the centre. Would you like me to make a reservation? Sentence10: I'm looking for some boats in the East, actually. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No, are there any guesthouses available in the Centre? Sentence2: The acorn guest house is in the north part of town. Would you like to make a booking? Sentence3: No, that is in the moderate price range. Sentence4: I would like one that is in the expensive price range, please. A bit more upscale. Sentence5: I am sorry but I cannot find a guesthouse in the north that is expensive. Would you like me to look for a different price range? Sentence6: No there are no guesthouses in the centre. Would you like anything else? Sentence7: Is that in the expensive price range? Sentence8: I want to find a guesthouse to stay at in the north part of town. Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User