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

[EX Q]: 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 A]: Answer: (A) User

[EX Q]: Sentence1: Can I get the travel time and price on the 5:52 one? Sentence2: Tenpin is an entertainment attraction in the south part of town their phone number is 08715501010, and address is cambridge leisure park, clifton way Sentence3: I will need more information to narrow down the results. What day would you like to depart on, and what area is your departure from? Sentence4: Ok, and I also want to find out about an attraction called Tenpin please. Sentence5: TR5348 leaves Ely at 5:35 and arrives in Cambridge by 5:52. The price for a ticket is 4.40 pounds and the ride's duration is 17 minutes. Sentence6: Great, thank you. Sentence7: Departing fro Ely on Wednesday and arriving by 09:30. Sentence8: I'd like train information for cambridge. Sentence9: Thank you so much for the information Sentence10: There are two trains. One arriving at 5:52 and one at 7:52. Would you like me to book one of these for you? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Okay, happy to help! would you like more information or a reservation? Sentence2: I have several trains traveling to stansted airport, which day would you like to leave? Sentence3: no. that is all i need. thanks. bye. Sentence4: Yes, that sounds good. Thank you. Sentence5: I need to take a train from Cambridge to the stansted airport, which train would be the best one? Sentence6: I would take the guesthouse. Sentence7: Is there anything else I can help you with? Sentence8: I need to leave on Tuesday after 16:00, please. Sentence9: The hotel please. I need to book it for 3 people 4 nights starting friday. Sentence10: Okay I have two different options. There is a guesthouse and a hotel. Both have free parking and wifi. Any preference as to which one? Sentence11: Great! Have a nice evening. Sentence12: TR0471 leaving Cambridge on Tuesday at 16:40 and arriving at Stansted Airport by 17:08. Would this one work for you? Sentence13: Yes I'm looking for a place to stay in the south part of town with a 3 star rating. Sentence14: You are booked into the lensfield hotel. The reference number is O46I4NOR . My I help you with something else? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System