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

Sentence1: Would that be London Liverpool or London Kings Cross? Sentence2: We don't have any trains going from Ely to London Liverpool or London Kings Cross. Do you need anything else? Sentence3: I will be leaving from Ely and going to london. Sentence4: Are you sure you don't have a preference? Sentence5: Either one is fine with me. Sentence6: On Saturday I need a train that will arrive by 21:45. Sentence7: Yes I'm sure. I need to book that for 5 people. Sentence8: Can you tell me where you will be departing from and heading to? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: I want the postcode Sentence2: The post code for the hospital is CB20QQ. Sentence3: Okay. Enjoy the rest of your day today Sentence4: Thank you. That was all I needed. Sentence5: Okay, Addenbrooke's hospital is located at Hills Road, Cambridge. Would you like the phone number? Sentence6: I am looking for the Addenbrookes Hospital Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System

Sentence1: Can I book a table for 6 people at 15:45 on Tuesday? Sentence2: Can you try another restaurant? Sentence3: Let's try the other restaurant. Sentence4: Okay, we have the cambridge university botanic gardens in the centre of town. Will that work for you? Sentence5: I want to make sure I can get from the park to the restaurant in time. Sentence6: I'm sorry neither restaurant has an available table would you like to try another day or time? Sentence7: I am looking for a restaurant in the expensive price range that serves thai food. Sentence8: I also need a taxi to go from Sala Thong to the Gardens. Sentence9: Sure, they're in postcode cb21jf. Is there anything else I can help you with today? Sentence10: There is sala thong and bangkok city. Sentence11: Have a great day! Sentence12: I was able to book you a table at Sala Thong on Tuesday at 15:45 for 6 people. Your reference number is EPNSY28V . Anything else I can help with? Sentence13: Thank you! That will be all. Sentence14: Yes, that will work great. Can I get their postcode please? Sentence15: Okay i have you booked for a yellow volvo. The contact number is 07033533386 . Sentence16: I would like to go to a park in the centre of town. What would you recommend? Sentence17: There are no reservations at that time. Would you like to try another time slot or another restaurant? Sentence18: What time do you want the Taxi to meet you? Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System