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

[Q]: Sentence1: In the centre yes please. Sentence2: Can you give me the contact number for that taxi you booked? Sentence3: No, thank you. That all sounds good. Sentence4: I need info on the Cambridge and County Folk Museum please. Sentence5: At what time would you like to leave the museum? Sentence6: Anything else I can do for you? Sentence7: What type of car have you booked? Sentence8: I'm also looking to book a taxi between the two locations. Sentence9: Ok, it's called Ali Baba. How many people will be in your party? Also, what day and time would you like? Sentence10: Okay, your table is booked. The reference number is 7GD7F8A8 . Anything else I can do for you? Sentence11: Yes, I will have one pick you up Sentence12: A grey lexus will be picking you up. Can I assist you with anything else? Sentence13: I am sorry but there is not a lebanese restaurant in the west area, but I found one in the centre. Would you like me to book a reservation? Sentence14: Okay do not hesitate to call us if you need something else. Sentence15: No thank you. But thank you for all your help. Sentence16: The museum is located in the west side of town at 2-3 Castle Street. The entrance fee is 3.50 pounds. Their phone number is 01223355159. Shall I connect you? Sentence17: Your booking is completed. You will be picked up by a grey lexux. Can I help you with anything else today? Sentence18: could i get a taxi as well? Sentence19: Absolutely, the contact number for the taxi that I have booked for you is 07503689471. Is there anything else I may assist you with? Sentence20: I would like to make a reservation for 2 people at 19:30 on Tuesday. Sentence21: I just want to make sure I am at the restaurant by 19:30. Sentence22: Yes, I am also looking for a nice, moderately priced Lebanese restaurant in the area. I'd prefer it to be within walking distance of the museum. Question: Who has spoken the sentence 18? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Could you check the spelling(city centre north b and b) and try to search again? Sentence2: The TR2512 takes 51 minutes. Anything else you need? Sentence3: I will be traveling on Thursday. Sentence4: It is a cheap, 0 star guesthouse located at 328a histon road on the north side. It has free internet and parking. Phone number and postcode are 01223312843 and cb43ht. Sentence5: Yes I am looking for information on a hotel called City Center North B and B. Sentence6: Sure! give me the following information: Day of visit, number of people and number of days that you will be staying. Sentence7: I cannot find that hotel. Any other hotels you would like to find? Sentence8: You're all set. Your reference number is HOSVDEGA . Can I help you with anything else today? Sentence9: Do you have a time preference? Sentence10: Well that will not work. Sentence11: I need to arrive by 14:15. Sentence12: there are many trains but you need to tell us which day you want to travel Sentence13: I am also looking for a train into Cambridge from London Kings Cross. Sentence14: Please book for 2 people starting on thursday for 4 nights. Sentence15: enjoy your stay in Cambridge! Sentence16: The TR2512 will fit your needs. Would you like to book this train? Sentence17: The first train leaves at 5:17. Sentence18: Thank you. Are you able to book that for me? Sentence19: Not at this time. What is the travel time for that train, please? Sentence20: no that will be all thanks Question: Who has spoken the sentence 19? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Yippee Noodle Bar meets your criteria, would you like their information? Sentence2: Thank you for using the Help Desk. Have a great day! Sentence3: I should leave Cambridge on sunday and arrive in london liverpool street by 14:30. I need 4 tickets and a reference number. Sentence4: Yeah, tell me the address for that restaurant and the type of food they serve Sentence5: Booking was successful, the total fee is 66.4 GBP payable at the station . Reference number is : B8QZ32WO. Can I help with anything else? Sentence6: Yes, that's perfect. I need tickets for 4 people, please. Sentence7: Yes, i need to find a restaurant to visit in the centre of town. Preferably in the moderate price range. Sentence8: TR5504 would arrive at 13:27, would that work? Sentence9: Do you know what time you need to depart or arrive by so I can narrow the options? Sentence10: I will be traveling on a Sunday, and I need to arrive by 14:30 Sentence11: You will be traveling on Thursday or Sunday? You've said both. Sentence12: There are 21 that fits your criteria. Which cuisine would you like, to help narrow your choices down? Sentence13: They are an Asian/Oriental restaurant, and are located at 40428 King Street City Centre. Is there anything else I can assist you with? Sentence14: It doesn't matter. Sentence15: That is all that I need. Sentence16: I need a train from cambridge to go to london liverpool street Sentence17: sure, what day are you traveling? Sentence18: I will be traveling on Thursday. Question: Who has spoken the sentence 16? (A) User (B) System
[A]:
Answer: (A) User