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

Ex Input:
Sentence1: maybe, give me the address of one please Sentence2: There are several college's in the centre. How about Saint Catharine's College? It is on King's Parade and has free admission. Sentence3: I have train TR3343 arriving at london kings cross tuesday at 7:00. Shall I book that for you? Sentence4: Hi, I'm trying to find a place to go in the centre. A college would be fun to visit! Sentence5: Where will you be departing from, and what day would you like to travel? Sentence6: Yes, I need 4 tickets please. Please send me the reference number. Sentence7: Great! I would be happy to help you find one. Are you looking for one with free admission? Sentence8: Have a nice day and thank you for contacting us. Sentence9: Your tickets have been reserved, and just to clarify, that train departs at 07:00, and arrives in London, Kings Cross at 07:51. Wouldn't want you to miss the train! Ref#: AQDCG6N8 Sentence10: I'll be departing from Cambridge, and would like to leave on Tuesday. Sentence11: Thank you. I also need a train to London Kings cross, arriving by 9 Sentence12: OK thank you that is all I needed today. Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Sure, what will your arrival station be? Sentence2: Thank you! What kinds of restaurants are available? Sentence3: Yes, please. For Friday. 3 people at 16:30. Sentence4: Oh thank you so much. I also need a train from Bishops Stortford, can you help with that? Sentence5: Your welcome, Have a nice day. Sentence6: sure, i have 9 options for you Sentence7: Sure. The Graffiti is a restaurant that serves British food. The phone number is 01223277977. Would you like to make a booking? Sentence8: It is a total time of 38 minutes for the trip. Anything else that I can assist with? Sentence9: The departure time is 09:29. Is there anything else that I can help you with today? Sentence10: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 86G11ZVP . Sentence11: I will be heading into Cambridge. I will need it for Friday arriving by 12:00. Sentence12: Are there any expensive places to dine in the West? Sentence13: No that's ok. I just need the travel time. Sentence14: TR2083 will arrive at 10:07. Want to book? Sentence15: Nothing else today. Thanks so much for your help. Bye. Sentence16: Yeah, can you confirm the time I need to be at the station? Sentence17: I see british, european, and indian available. Sentence18: Can you tell me about one of the restaurants that serves British cuisine? Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: I'm heading to the bridge guest house. Sentence2: Have a great day! Sentence3: Great. Thank you. Sentence4: Hi, I am looking to book a taxi departing from Loch Fyne after 11:00. Sentence5: What is your destination? Sentence6: I have confirmed a taxi for you, picking you up at 11:00 at loch fyne. A yellow lexus will pick you up. Their contact number is 07307653173. Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System