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: That is all I need for today. thank you. Goodbye. Sentence2: I have 7 available. The first leaves at 17:32, and arrives at 18:32. Would you like me to book that for you? Sentence3: I'll be departing from Broxbourne and I'd like to go to Cambridge. Sentence4: I'm not looking to book at the moment, can I just get the train ID? Thanks! Sentence5: Okay glad I could help. Enjoy your trip. Sentence6: I'd like to find a train that leaves after 17:00 on Saturday. Sentence7: Of course! TR0811 leaves at 17:32, arrives at 18:32, with a duration of 60 minutes. The price is 14.32 pounds. May I assist you with anything else? Sentence8: Absolutely, I need departure and destination information and a time you need to arrive by. Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: can i get the phone number for wandlebury country park? Sentence2: I have booked Warkworth House starting Monday for 5 days for 2 people. Reference #XLIO11MV . Sentence3: You're in luck; there are two beautiful parks in the south and both have free admission. Sheep's green and lammas land park fen causeway or wandlebury country park. Sentence4: Great, thanks. Can you also recommend something fun to do in the south part of town? Sentence5: Also what car type is it? Sentence6: Sure, the phone number is 01223243830. Sentence7: i want to book the hotel for two people and five nights starting from monday Sentence8: I'm sorry, I don't understand your question. Do you need to book a taxi? Sentence9: No thank you have a nice day. Sentence10: I'd like to take a stroll at a park. Sentence11: That is a nice guesthouse located on Warkworth Terrace on the East side of town. Can I tell you something in particular? Sentence12: Can you give me some information on the Worth House? Sentence13: Thanks so much for the help. Sentence14: Sorry to confuse. Yes, can I book a taxi from Wandlebury Country Park to Warkworth House. I want to leave by 11:30. Sentence15: You are welcome, have a good trip. Sentence16: Your taxi is booked, a grey tesla. Your contact number is 07097592462. May I help with something else? Sentence17: Thank you for contacting us have a nice day. Sentence18: Sure, is there a particular type of activity you are interested in. A museum or nightclub perhaps? Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User