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

[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: That's all I need for now. thank you very much. Sentence2: Addenbrookes Hospital. The contact number for the paediatric intensive care unit is 01223217715. Sentence3: Can I get the postcode as well? Sentence4: Where's the closest hospital with a paediatric intensive care unit? Sentence5: You are welcome! Have a great day! Sentence6: It looks like the Post Code is CB20QQ. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: When are you planning to travel? Sentence2: Yes, the 18:40 would work, how much does it cost? Sentence3: The earliest train after that time is TR7696 that leaves at 18:40 and arrives at the airport by 19:08. Would that work? Or, I have later trains. Sentence4: The price per ticket is 10.10 pounds. Would you like me to go ahead and book it for you? If so, for how many tickets? Sentence5: enjoy your stay in cambridge! Sentence6: Yes, thank you. Sentence7: That's OK, no thank you. Are there any nightclubs in town? Sentence8: Monday. I need to leave after 18:15 Sentence9: Yes there's 6 in the centre and 1 in the south. Sentence10: No thank you that is all. Sentence11: What's the postcode for the one in the south? Sentence12: Please help me book a train from Cambridge to Stanstead Airport. Sentence13: Is there anything else I can do for you? Sentence14: The nightclub called the Place is located at the postcode cb23hg. Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]:
Answer: (B) System