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

Ex Input:
Sentence1: Thank you so much. That is all I will need today. Sentence2: Great, how many tickets would you like to purchase? Sentence3: That would be perfect! Sentence4: I am looking to go from cambridge, and go on friday arriving by 14:30 Sentence5: Okay, how about the TR5901 leaving at 13:34 and arriving at 14:24 with a duration of 50 minutes? The cost is 16.50 pounds. Would that work for you? Sentence6: There are 266 trains going to Peterborough. Can you give me a departure day and time so that I can narrow down your choices? Sentence7: Your tickets are all booked, reference number R5P65TW5 Sentence8: I'd like to find a train to peterborough. Sentence9: Thank you for contacting Cambridge TownInfo centre. Have a wonderful day! Sentence10: 7 tickets please. Can I also have the reference number for the booking? Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: I'm looking for an expensive restaurant to dine at, somewhere in the North End of the Cambridge area. Sentence2: I have many different times available. The first one leaves at 12:26 followed by 13:36, 14:36, 15:36, and so forth until 23:36. Which time would you like best? Sentence3: I'm glad I was able to help! Thank you for using the Help Desk. Have a great day! Sentence4: I have many trains leaving from Cambridge to London kings cross on Friday. What time would you like to book the train for? Sentence5: There are 5 expensive restaurants on the north side of town. What type of food would you like? Sentence6: Thanks! I also need to book a train leaving Cambridge on Wednesday. Sentence7: Any type of food is fine. Can you book a table someplace that sounds good? I need a table for 4 on tuesday at 19:30. Sentence8: Uuh... actually, I'm headed to norwich from cambridge on Wednesday. Sentence9: I apologize see that the TR5574 leaves Cambridge for Norwich Wednesday at 12:36 and arrives at 13:55. Will that work for you? Sentence10: I have booked you a table for 4 on Tuesday at 19:30 at Saigon City, on the north end of Cambridge at 169 High Street Chesterton and your reference number is JARZR20Q if you need to contact them between now and then. Sentence11: 12:26 should be okay can I please get the train ID and travel time? Sentence12: Sorry about the confusion on that, what time would you like to depart? Sentence13: Thank you for that information, that is all I need at this time. Sentence14: I would like to leave after 12:00 please, what do you have available? Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: I need a train going to bishops stortford leaving after 16:15. I need eight tickets and the reference number please. Sentence2: What is the address? Sentence3: They are located on Sidgwick Avenue and they have free entrance. Anything else I can help you with today? Sentence4: Have a very nice day and thank you for calling. Sentence5: There are some great colleges in the west. Or perhaps the Museum of Classical Archeology? Sentence6: They are museums. Sentence7: I am looking for somewhere to go in the east. Sentence8: I would like to travel on friday. Sentence9: Where will you be leaving from? Sentence10: There's a boat dock, museums, or some entertainment venues in the east. Do any of those sound interesting? Sentence11: No that's all for today, thank you. Sentence12: What day would you like to travel? Sentence13: My bad, I meant the west. Sentence14: I will be coming from Cambridge. Sentence15: Okay your train reference number is YXCN2XHO . Is there anything else you need? Sentence16: Thanks so much. What type of attraction are they? Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:

Answer: (A) User