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

[EX Q]: Sentence1: looking for a train going to Cambridge. Sentence2: How about TR3350 that leaves at 05:17? Sentence3: you can book it. get me the reference number too Sentence4: I am leaving on Sunday and need to arrive by 13:00 Sentence5: Thank you for using our services. Sentence6: Thank you that is all I needed. Sentence7: W8YHJKSV is the reference number Sentence8: What day and time are you wanting to travel? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I'd like to find an expensive restaurant in the north part of town. Sentence2: The restaurant should serve asian oriental food. Sentence3: You are welcome. Sentence4: Yes, I would like to be booked for a table for 8 on 19:45 on a Saturday, and could I also get the reference number? Sentence5: Your reservation has been made and the reference number is 3P2ALRY0 . Sentence6: I have one restaurant called saigon city on 169 high street chesterton chesterton. Would you like me to book for you? Sentence7: There are many restaurants in the North that match your description, what type of cuisine are you interested in? Sentence8: Thank you for your help. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes, for 6 people, and I will need the reference number please. Sentence2: There are about 70 options. Do you have a particular travel day? Sentence3: I found it, it's a cheap guesthouse in the west. Would you like me to book it for you? Sentence4: Your reservation is confirmed. Your reference number is 31S3UK6M . Can I help with anything else? Sentence5: Hi, I'm looking for a train that's going to bishops stortford from cambridge, what kinds of options are there? Sentence6: Yes for 6 people for 5 nights starting saturday. Sentence7: Thanks, I also am looking for a hotel called finches bed and breakfast a friend mentioned. Sentence8: I would like to travel on Thursday and get there before 13:30. Sentence9: No, that is everything I need. Thank you for all your help! Sentence10: I got 6 tickets for you your reference number is ADZ8DIQ2 . Sentence11: Train TR2929 leaves Cambridge at 11:29 on Thursday and arrives at Bishops Stortford at 12:07. Would you like me to book it for you? Sentence12: If there is nothing else you need help with, have a great day. Goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User