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: It looks like there are hourly trains starting at 5:09. Did you have a particular day and time in mind? Sentence2: Thanks for the help. Sentence3: Will you train arriving at 07:54 work ok for you? Sentence4: Yes I need it booked for 2 people please. Sentence5: Unfortunately, there are no other Italian restaurants in the east. Would you like me to find you one in another area? Sentence6: Is the pizza hut in the moderate price range? Sentence7: I've successfully booked 2 tickets for you, the reference number is 9FE8N16G . Sentence8: I am looking for an Italian restaurant in the east. Sentence9: Pizza hut fen ditton matches your description. Sentence10: I guess it'll have to do. Can you book us a table for 2 on Wednesday at 14:00 please? Sentence11: Uh, no pizza hut's please. Something more classy please. Sentence12: Absolutely! To start, let me get more details. What are your desired departure and arrival cities? Sentence13: Thanks so much! Can you help me with train tickets too? Sentence14: Yes, it is. Should I book it for you? Sentence15: Yes, I'd like to book the train for Wednesday and I want to arrive in Cambridge by 08:30. Sentence16: Booking was successful. The table will be reserved for 15 minutes.Reference number is : H4BTTI6P . Sentence17: The train should go to cambridge and should depart from leicester. Sentence18: Have a great day! Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Enjoy your visit to cambridge and gave a good day. Sentence2: No, you have been very helpful, thank you. Good bye. Sentence3: Great can you book that for one person? Sentence4: I'd be glad to. We have 13 colleges in the centre. Most are free to visit, such as Christ's College over on Saint Andrew's Street. Sentence5: Thanks! Can you help me find a college to visit in the centre? Sentence6: I have heard of Christ's College. Is there a more detailed address? I would also like their phone number, please. Sentence7: I only have an address of St. Andrew's Street, but the phone number is 01223334900 if you would like to call them. Anything else I can help with? Sentence8: I will be leaving on a Tuesday and I would like to arrive by 17:30. Sentence9: TR4887 leaves at 05:40 Sentence10: I can find you quite a few trains for your trip. On what day will you be traveling, and at what time would you like to depart? Sentence11: I'm planning a trip to Cambridge and need info on trains. I am coming from Birmingham New St. Sentence12: Done and done! Booking was successful, the total fee is 75.09 GBP payable at the station. Your Reference number is : Q649D1SU . Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User