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

Ex Input:
Sentence1: We have 13 trains meeting your criteria. Do you have any idea how early you want to leave? The first train leaves at 11:32 and then every hour after that Sentence2: Are there any cheap options in the centre of town? Sentence3: We can take care of that too, but let's get your restaurant squared away first - in order to provide an address I'll need to know what type of cuisine? Sentence4: Whichever one you think is best please. Sentence5: to cambridge from broxbourne. i need to leave after 11:15 please Sentence6: Where will you travel too and from? Sentence7: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence8: excellent. I will need the train booked for 5 as well. Sentence9: It has been booked. You reference number is UCICW103 . Sentence10: I recommend the Dojo Noodle Bar. They're located at 40210 Millers Yard, City Centre. Sentence11: I will be traveling on Sunday. Sentence12: Hi. Can you help me find a restaurant? Sentence13: and what day will you be traveling on? Sentence14: The train should leave broxbourne after 11:15 so the 11:32 is a good choice. There are 5 of us traveling together. Please book. Sentence15: There are a lot of options in Cambridge. Can you please be more specific? Sentence16: Yes, there are chinese, asian oriental, indian, italian, spanish, portuguese, modern europe, and mediterranean available. Sentence17: Great. Thank you so much. Sentence18: Can I have the address? I am also looking for a train that leaves on Sunday to Cambridge. Question: Who has spoken the sentence 16? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: Booked! You leave at 13:17, your reference number is 3WICPFQP, you will pay 141.6 at the station. Sentence2: I am looking to book a train. Sentence3: Could you tell me your location, which area of town or what business you are departing from? Sentence4: Certainly. May I ask where you want to depart from? Sentence5: I need to depart from London Kings Cross and go to Cambridge. Sentence6: We are leaving London Kings Cross and need to do so after 12:45 on Friday for 6 people and can I get the reference number for the booking? Sentence7: Okay thank you. That is all I need. Sentence8: Okay thank you for calling. Sentence9: I would like to leave from the closest station to my location. Sentence10: To clarify, are you looking for a train to Cambridge? All Friday trains from London Kings Cross go to Cambridge. Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: The car is a white volkswagen. May I help you with anything else? Sentence2: I need to return back to the hotel from the restaurant. Sentence3: Possibly, does this guesthouse hotel offer free parking and free wifi? Sentence4: The Allenbell is located in the East area. Would you like its address? Sentence5: What price range do you have for vegetarian food in the centre area? Sentence6: Yes. We have two restaurants that meet your criteria. Would you like me to book one for you? Sentence7: All right, I have booked you a taxi from the restaurant back to your lodgings. It will be a white volkswagen, and it will arrive to pick you up at 10:00. Is there anything else you need? Sentence8: That could work. Where is Allenbell located? Sentence9: I just need the address for one of the restaurants. Sentence10: You are welcome. Have a great day, goodbye. Sentence11: I'd be happy to help with your request, but first I will need to know what your destination is from the restaurant. Sentence12: Are there any that serve spanish food instead? Preferably in the center area as well. Sentence13: Thank you. The last thing I think I need is a taxi. To pick me up at the restaurant by 10.00? Sentence14: Yes I will also need the contact number for the taxi. Thanks Sentence15: The a and b guest house meets your needs. Would you like to book it? Sentence16: I'm looking for a nice guesthouse to stay at during my trip to Cambridge. Anything with a 4 star rating will do. Sentence17: I am also looking for a cheap restaurant in the area that serves vegetarian food. Sentence18: The address for La Tasca is 14 -16 Bridge Street. Sentence19: How about Allenbell? This meets all your criteria. Sentence20: No, that is all! Thank you very much! Sentence21: There are no results for a vegetarian restaurant in any price range in the centre area. Would you like to broaden your search to another area? Sentence22: What is the car type that will be sent? Sentence23: The contact number is 07800878036. Anything else I can do for you? Sentence24: I'm not finding any cheap vegetarian restaurants. Is there something else you'd like to look for? Question: Who has spoken the sentence 20? (A) User (B) System

Ex Output:

Answer: (A) User