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

[EX Q]: Sentence1: i want some mexican food. Sentence2: Dojo Noodle Bar serves asian oriental food and is located in the centre of town. The price range is cheap. Sentence3: The phone number for dojo noodle bar is 01223 363471. Would you like any other information? Sentence4: I don't care. Sentence5: You're welcome. Goodbye. Sentence6: We have four Asian oriental restaurants in centre. What price range do you prefer? Sentence7: What is the phone number? Sentence8: No, thank you, that's all I need. Thank you and goodbye! Sentence9: The only listing for Mexican food is Chiquito Restaurant Bar. How else may I assist you? Sentence10: I want a restaurant in the centre and serves asian oriental food? What is the phone number? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Okay. Sorry for the mix-up. Thanks for checking. Sentence2: The travel time is 105 minutes and the cost is 37.80 pounds. Sentence3: I'm looking for something in the expensive price range. Sentence4: I would like to recommend Ugly Duckling. Would you like me to make reservations for you? Sentence5: Yes, a table for 1 at 20:30. But could you check the train again? I need to leave from Liecester, not arrive there. Sentence6: No you have been a great help, thanks. Sentence7: TR6723 leaves on monday from cambridge arriving in leicester at 16:06. Would that work for you? Sentence8: Now that your reservation at Ugly Duckling is taken care of, is there anything else I can assist you with today? Sentence9: We have 77 options available. Is there a certain day you want to travel? Sentence10: I have your table for 1 booked at the Ugly Duckling, Monday at 20:30. The reference number is YDG81NJ5 . Just a moment while I check on the train. Sentence11: Yes, I'd like to leave on Monday, going to Cambridge from Leicester. Sentence12: It was a pleasure to help you. Thanks for using our service. Goodbye. Sentence13: Okay, I also need a Chinese restaurant in the centre, please. Sentence14: Could I have the travel time and price for that particular train? Sentence15: Yes I can book that for you if you would like. Sentence16: I have 10 restaurants in the centre area that have chinese. Do you have a certain price range in mind? Sentence17: Yes, that would be great. Thank you. Sentence18: I am looking for a train that leaves Cambridge going to Leicester arriving by 16:15 Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Unfortunately I am unable to book at 22:00 at Caffe Uno, do you have another time? Sentence2: I need the reservation for three. Sentence3: Ok, TR6692 leaves Cambridge at 19:21 and arrives in Stevenage at 20:10. Will this work for you? Sentence4: I can help you with both of those things. Let's start with what type of food or what part of town you would like to eat. Sentence5: How many people will be dining at cafe uno? Sentence6: thanks alot.that is all i needed for today Sentence7: Yes I have one restaurant matching your criteria called Royal Spice. Would you like their telephone number? Sentence8: That ticket will be 12.80 pounds. Sentence9: Sounds good. Can you book a reservation for Tuesday at 22:00? Sentence10: Could I get the price of that train please? Sentence11: How about cafe uno in the centre? Sentence12: He, I am looking forward to trying some local restaurants in Cambridge. Can you tell me about some train schedules? Sentence13: No thanks, I need a train from cambridge to stevenage in Tuesday. I want to arrive before 21:00 Sentence14: Um I meant 14:45, my mind wandered, who wants dinner two hours before midnight, lol. Same booking but 14:45 please. Sentence15: Thanks. Now I think you could help me with an expensive Italian restaurant perhaps? Sentence16: Great! glad I could help! Sentence17: Booking was successful. The table will be reserved for 15 minutes. Reference number is : MRKAMZJM . Anything else I can help with? Sentence18: Can you help me find a cheap restaurant in the north with indian food? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]:
Answer: (B) System