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

Q: Sentence1: Goodbye. Sentence2: Nandos sounds great. Thank you. Sentence3: Goodbye. Sentence4: thank you good bye Sentence5: Yes, I'd like a restaurant that serves portuguese food. Sentence6: nandos is the only restaurant i can find in the south that serves portuguese. Sentence7: Hi. I'm trying to find a good restaurant in the south part of town. Sentence8: There are several good restaurants in the south part of town. Do you have a preference for the type of food or price range? Question: Who has spoken the sentence 2? (A) User (B) System

A: Answer: (A) User
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Q: Sentence1: There is a restaurant called Thanh Binh. Would you like me to book a table? Sentence2: Yes i would like a table for 7 people on monday at 13:15 Sentence3: We would prefer vietnamese please. In the west area? Sentence4: How many tickets would you like me to book? Sentence5: The travel time is 49 minutes. Would you like to know any more info? Sentence6: Thank you, what is the arrival time? Sentence7: Your reservation has been set for Monday at 12:15 for 7 people. The reference number is 3MTLQCBA . Can I do anything else for you? Sentence8: I am leaving from Cambridge and headed to Stevenage. I would like to leave after 17:30 please. Sentence9: Just one ticket, please. Sentence10: Certainly. The train will arrive at 20:10. Can I help you with anything else? Sentence11: Can you tell me when that train will be arriving in stevenage? Sentence12: Alright, TR6692 looks like your best bet. Would you like me to book you passage? Sentence13: Thank you I also need a train on tuesday leaving after 17:30 Sentence14: I think that about does it. Thanks for the help today. Sentence15: I need to find a cheap place to eat. Sentence16: Booking was unsuccessful do you have any other preference? Sentence17: Can you try 12:15 on Monday? Sentence18: I've booked that ticket for you. The reference number is FTLHURXQ, and the total fee is 12.8 GBP. Sentence19: It was my pleasure to assist you. Thanks for using our service. Have a wonderful day. Goodbye. Sentence20: Yes. Please book that for me. Thanks so much! Sentence21: I can find that for you. What cuisine are you interested in? Sentence22: I would be happy to help with that. Can you tell me the departure city and where you are going? Question: Who has spoken the sentence 11? (A) User (B) System

A: Answer: (B) System
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Q: Sentence1: Will an arrival time of 22:01 work for you? Sentence2: It costs 17.90 pounds. I need to know your arrival time to determine the trainid. Sentence3: Have a nice day. Sentence4: Yes, I'll be leaving from cambridge. What's the train number and cost? Oh, and how long is the trip? Sentence5: will you be leaving cambridge? Sentence6: Where will you be traveling to? Sentence7: Yes, that would be fine. I'll need the price and travel time for that, please. Sentence8: I was able to reserve a table at Prezzo on Thursday at 16:00. The table will be reserved for 15 minutes, reference number R0Q4HL63 . Can I assist with anything else? Sentence9: No thank you that will be all Sentence10: I also would like to book a table for 3 at prezzo for 16:00 the same day I arrive or Tuesday. I need the reference number also. Sentence11: I have 2 trains going to broxbourne, do you have an arrival time preference? Sentence12: I'm looking for a train that leaves on Thursday after 21:30. Sentence13: I will be going to Broxbourne. Sentence14: i just want to leave after 21:30 Question: Who has spoken the sentence 4? (A) User (B) System

A:
Answer: (A) User
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