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

[EX Q]: Sentence1: Sure, it's at granta place, Mill lane. Sentence2: Sure it's a moderately priced 4 star guesthouse in the east. Would you like me to book it? Sentence3: From all of us at Cambridge, we hope you enjoy your stay! Farewell! Sentence4: Thank you so much for all of your help today. I am all set. Bye. Sentence5: Could you tell me their address as well please? Sentence6: Thanks! I'm also looking for information on the A & B Guesthouse. What can you tell me about that place? Sentence7: Yes, the post code for the A and B Guest House is cb12dp. Is there anything else I can do for you? Sentence8: What is the phone number for scudamores punting co? Sentence9: Okay, which would you like to leave from? Sentence10: The phone number for Scudamores Punting Co is 01223359750. Is there anything else I can help you with today? Sentence11: Your taxi is booked. The car is a yellow honda and the contact number is 07826111038 Sentence12: May I have the postcode? Sentence13: I would like to leave the hotel by 7:00. Also, can you give me the contact number and car type once you have booked it? Sentence14: I also need a taxi to go between the two places. Question: Who has spoken the sentence 4? (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: Yes I have two in the moderate price range and on in the cheap price range, any preference? Sentence2: Yes. Please book 4 people for 5 nights starting thursday. Sentence3: Have a great day! Sentence4: I was able to get a room for you at aylesbray lodge. Your reference number is bb07ctao . Anything else? Sentence5: I want to stay at a guest house, in the south. Sentence6: I will need free internet. Sentence7: They all have free internet. Would you like me to book one for you? Sentence8: If you need further help, let us know. Bye, thank you. Sentence9: No that is all. Thanks! Sentence10: You too thank you! Goodbye. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System