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 to know if the Worth House is still renting rooms. Sentence2: Yes make the booking or me for 2 and provide the reference number. Sentence3: Ok, I was able to make your reservation. Your total fee is 33.2 GBP. Your Reference number is : POE0NTR1 . Sentence4: yes book for 2 people and 3 nights from thursday Sentence5: Thank you very much. That is all the information I need. Sentence6: The TR1047 leaves Cambridge for London Liverpool Street Wednesday arriving at 07:27. The price is 16.60 lbs. Can I book it for you? Sentence7: Where are you departing from, and what day? Is there a certain time you need to leave or arrive by? Sentence8: i am planning your trip in Cambridge Sentence9: Sure, you really should be more pleasant. I need to get to London Liverpool Street on Wednesday by 20:45 please. Sentence10: Okay great! Have a great trip! Sentence11: Thanks. I also need to find a train to london liverpool street. Sentence12: Are you planning a trip to Cambridge? If so, what type of information are you looking for today? Sentence13: Since this is the cambridge help desk, I assumed that, I really need the date and time to get you booked. Sentence14: I am leaving from Cambridge. Sentence15: Yes they are. Would you like to book a room? Sentence16: Booking was successful. Reference number is : WX6QA7D0 . Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: No thank you. You have helped tremendously. Sentence2: What is the address and postcode, please? Sentence3: Can you help me? I was in a car accident dispute. Sentence4: The Parkside Police Station's phone number is 01223358966 Sentence5: you are welcome Sentence6: The address is Parkside and the postcode is CB11JG. Can I help you with anything else? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Certainly! There are 3 options for moderately priced restaurants in the West: British, Indian or Italian. Do you have a preference? Sentence2: I'm wanting to find a restaurant. The location I want is the west and I want something in the moderate price range. Can you help me? Sentence3: Could I have the phone number for the Indian restaurant? Sentence4: You're welcome! Have a great day! Goodbye. Sentence5: Yes, the phone number for the meghna restaurant is 01223727410. What other information would you like? Sentence6: That's all that I needed, thank you. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System