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 am planning a trip in Cambridge and need a place to stay with free parking. Sentence2: Excellent. Can I book that for 2 people for 2 nights starting on Tuesday Sentence3: I have many different options available. Let me ask, do you have a certain price range or area in mind? Sentence4: Thanks i will find you one.Thanks a lot Sentence5: I have no particular price range, but would like a guesthouse in the north part of town. Sentence6: That narrows it down to about 9 different options. Most offer both free parking wifi. If you would like my personal recommendation, I would say go with the Hamilton Lodge. Sentence7: Booking was successful. Reference number is : 152UJWIK . anything else today? Sentence8: Yes, I need to find a train on Tuesday from Cambridge to London Liverpool Street. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Thanks again for helping to find me a place to eat. I have the reference number T44KC552. Sentence2: I am looking for a Cuban food place, in the east. Sentence3: No, thank you. You have been very helpful. Have a great day. Sentence4: Here is the address and the phone number: 7 Barnwell Road Fen Ditton, 01223244955. Sentence5: Yes, try that. Sentence6: Can you check again? The only thing I'm interested in is a moderately priced Cuban restaurant in the east. Sentence7: I apologize booking was unsuccessful. Would you like me to try Rajmahal Sentence8: Do you have a moderately priced Indian restaurant in the east? Sentence9: Yes I have 2. Curry Prince and Rajmahal. Sentence10: I will try the Curry Prince. Can you book a table for 4 people on Monday at 17:30? Sentence11: I have you at Rajmahal, Reference number is : T44KC552 . Anything else you need? Sentence12: I am sorry but there aren't any restaurants matching your criteria. Can I help you with something else? Sentence13: Enjoy your meal at the rajmahal. Have a great day. Sentence14: I apologize I am still not showing any restaurants that meet your criteria. Is there another type of cuisine you would prefer? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: No that will be all for now. Thank you. Sentence2: Absolutely. Their phone number is 01223332900. They are located on Trumpington Street. Is there anything else I can help you with today? Sentence3: I have found several trains that begin leaving at 5:21 until 15:21 to arrive by 16:45. Trains cost 12.80 pounds and are 49 minutes long. Do you prefer early or later? Sentence4: I need to travel on Wednesday, and I need to arrive by 16:45. Sentence5: It has free admission and is in the centre area. Sentence6: The 15:21 sounds good. I think all I need will be the train ID. Sentence7: Thank you for using our system! Sentence8: Trains depart approximately every 2 hours. What time would you like to leave/arrive by? Sentence9: Fantastic, can you also give me information on the Fitzwilliam Museum? Sentence10: The train ID for the 15:21 is TR7245. Sentence11: Can I have the phone number and the address of the museum? Sentence12: Hey! I am looking for a train from Cambridge to Stevenage. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]:
Answer: (B) System