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

[EX Q]: Sentence1: I'm departing from the oak bistro. Sentence2: I have the taxi ready for you Sentence3: I would like to leave after 17:00. Sentence4: Hi, I need a tax to queens' college please. Sentence5: What time would you like to leave? Sentence6: What is your departure site? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Alright. Enjoy your stay in Cambridge! Sentence2: Thank you. Have a great day. Sentence3: The train that arrives closest to 16:45 is best. I just need to know what time it leaves and arrives. Oh and of course it's ID. Sentence4: Yes. I am looking for a place to go in the west part of town. With preference to college. Sentence5: There are 6 days that arrive before 16:45 on this day. Did you have any other preferences? Sentence6: I am looking for information in Cambridge. I need a train ticket. Can you help? Sentence7: In the west part of town Clare College. The entrance fee is 2.50 pounds. Sentence8: Great that's all the information I need! Sentence9: Certainly. What is your departure location and your arrival location? Sentence10: It has been my pleasure. Feel free to contact us with any other questions you may have in the future. Sentence11: I would like to depart from London Liverpool Street and arrive in Cambridge. I would like to leave Sunday and arrive by 16:45? Sentence12: Of course! That will be TR6578 leaving at 13:39 and arriving at 15:07. The price is 13.28 pounds and it's an 88 minute duration. May I help with anything else? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: How about just one night instead? May I have the reference number please? Sentence2: Sunday. Could you please send me the reference number? Sentence3: Yes, I would like a guesthouse with a 0 star rating. Sentence4: El Shaddai sounds fine. I need to reserve it for two adults for two nights, please. Sentence5: There is city centre north b and b, and el shaddai which would you like to book? Sentence6: Sure, the 15:17 train's id is TR7931. Is there anything else I can help you with? Sentence7: I want to depart from london kings cross after 13:30. Sentence8: Sure, the first train leaves at 15:17. Would you like to book it? Sentence9: You are very welcome. Enjoy your stay! Sentence10: There are 200 trains coming to Cambridge on Sunday. Is there a particular time or departure location you're interested in? Sentence11: Great, that was a successful booking, the reference number is 9H97D0MB . Is there anything else I can help with? Sentence12: No that's all, thanks! Sentence13: I am also looking for a place to stay. I would like the hotel to have free parking and free wifi. Sentence14: I'm looking for a train leaving on Sunday that is going to Cambridge. Sentence15: Alright, what day will you be staying? Sentence16: No, I would like to book at a later time, but can I please get the train ID? Sentence17: My listings show almost 30 separate lodgings around town with free wifi and parking! Do you have any other preferences to help me pick one for you? Sentence18: Unfortunately the booking was unsuccessful. Would you like me to book it for another day or duration? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User