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

Ex Input:
Sentence1: Okay. Sorry for the mix-up. Thanks for checking. Sentence2: The travel time is 105 minutes and the cost is 37.80 pounds. Sentence3: I'm looking for something in the expensive price range. Sentence4: I would like to recommend Ugly Duckling. Would you like me to make reservations for you? Sentence5: Yes, a table for 1 at 20:30. But could you check the train again? I need to leave from Liecester, not arrive there. Sentence6: No you have been a great help, thanks. Sentence7: TR6723 leaves on monday from cambridge arriving in leicester at 16:06. Would that work for you? Sentence8: Now that your reservation at Ugly Duckling is taken care of, is there anything else I can assist you with today? Sentence9: We have 77 options available. Is there a certain day you want to travel? Sentence10: I have your table for 1 booked at the Ugly Duckling, Monday at 20:30. The reference number is YDG81NJ5 . Just a moment while I check on the train. Sentence11: Yes, I'd like to leave on Monday, going to Cambridge from Leicester. Sentence12: It was a pleasure to help you. Thanks for using our service. Goodbye. Sentence13: Okay, I also need a Chinese restaurant in the centre, please. Sentence14: Could I have the travel time and price for that particular train? Sentence15: Yes I can book that for you if you would like. Sentence16: I have 10 restaurants in the centre area that have chinese. Do you have a certain price range in mind? Sentence17: Yes, that would be great. Thank you. Sentence18: I am looking for a train that leaves Cambridge going to Leicester arriving by 16:15 Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: I need to find a hospital nearby that has a hepatobillary and gastrointestinal surgery referral center Sentence2: No, that's it. Thanks! Sentence3: No, I just need the postcode. Sentence4: You're very welcome. Have a great day! Sentence5: Certainly. The postcode is CB20QQ. Anything else I can help you with today? Sentence6: Addenbrookes Hospital located at Hills Rd, Cambridge has that department. Would you like the phone number to that direct department? Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: Absolutely! What area will you be staying in? Sentence2: Have a nice day. Sentence3: Not at this time, Thank you. Sentence4: Might I suggest The autumn house? The phone number is 01223210353. Sentence5: Do you have a specific arrival time you need. Sentence6: Could you help me find a place to stay on my upcoming trip? Sentence7: I'll be in the east. I need free wifi and free parking. I'd prefer something 4 star. Sentence8: 163 minutes. Would you like me to book it for you? Sentence9: There are 5 hotels that meet that criteria. Do you have a specific price range? Sentence10: No that is not an issue. Could I get their phone number of one you recommend. Sentence11: What is the travel time? Sentence12: Thank you. I also need a train from Birmingham new street on Sunday. Sentence13: The train should leave after 20:30 and should go to cambridge. Sentence14: Yes, I need to leave by 17:00. Sentence15: Train TR2274 leaves Birmingham New Street at 20:40 and arrives at Cambridge at 23:23. Would that work for you? Sentence16: Did you have a time you would like to arrive or leave? Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:

Answer: (B) System