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

Ex Input:
Sentence1: Help me find a moderate priced british food place please. Sentence2: Your reference number is T790DS3O and the total fee is 35.2 GBP, which is payable at the station. Sentence3: We will have to start over now. Sentence4: Not at this time. Could I just get the phone number? Sentence5: Yes please book it for 8 people Sentence6: Yes, restaurant one seven is located in the centre. Sentence7: Perfect, could you just tell me their phone number? Sentence8: you are welcome any time Sentence9: I also need a train from Ely to Cambridge on Tuesday to arrive by 12:30. Sentence10: I will work on booking this and be right back with you. Sentence11: No, that should be all. thank you very much. Sentence12: Is that restaurant in the Centre? Sentence13: TR3412 leaves at 11:35 and arrives at 11:52. Will this one work for you? Sentence14: Yes, sorry. Tuesday, leaving Ely and getting to Cambridge by 11:30. Sentence15: Okay, well I suppose this is goodbye then. Sentence16: The phone number is 01223337766 Sentence17: Actually, I need to change my reservation. I need the train to arrive by 11:30 instead. Sentence18: Thank you for using the Cambridge TownInfo centre. Goodbye Sentence19: I need it for 8, as I said. Do you have the reference number? Sentence20: Your updated train is now TR4669. Your new reference number is 2T4NNGG9 . The total fee remains the same. The train departs at 09:35 and arrives at 09:52. Anything else? Sentence21: Their phone number is 01223337766. Do you need assistance with anything else? Sentence22: restaurant one seven is a nice place. Do you want to book? Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: There is one concert hall in town, The Man on the Moon, located at 2 norfolk street in the centre of town. Do you need more information? Sentence2: Can you make a recommendation and please provide the entrance fee, phone number, and postcode. Sentence3: Can you help me find a concert hall? Sentence4: Cafe Jello Gallery Phone is o12233289438 and is on 13 Madalene treet Sentence5: Yes, I would consider a museum. Sentence6: great, there are 7 museums in the west. Sentence7: I need a concerthall on the west area of town. Sentence8: I am sorry I have only one listing for the city center. Would you consider other attractions? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: Thank you for using the Cambridge restaurant system. Good bye. Sentence2: Hello, I am looking for a moderately priced restaurant on the east part of town. Sentence3: curry prince and rajmahal which both serve indian food. And pizza hut fen ditton serves italian food. Sentence4: there are three venues to choose from Sentence5: Absolutely. Curry Prince's address is 451 Newmarket Road Fen Ditton. Is there anything else I can do for you? Sentence6: Do you have a preference on type of food? Sentence7: ok, what are they? Sentence8: Thank you, goodbye. Sentence9: Could I get the address of one of them? Sentence10: I don't care. Question: Who has spoken the sentence 6? (A) User (B) System

Ex Output:

Answer: (A) User