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

Ex Input:
Sentence1: ok thank you so much Sentence2: Yes, can you provide me the travel time and the price as well? Sentence3: I would be happy to book that for you. Are you travelling alone? Sentence4: That is all I need today thank you for your help. Sentence5: TR0721 departs at 11:50. Would you like me to book it for you? Sentence6: Absolutely! I have 70 trains going from cambridge to ely. Do you have a departure and/or arrival time? Sentence7: The address is the grafton centre, east road. Unfortunately, there isn't an entrance fee listed. Would you like information on an alternate attraction? Sentence8: I am looking for places to go in town located in the centre of town. Sentence9: There is the Vue Cinema downtown. If that interests you, their phone number is 08712240240. Sentence10: No that's okay. However, I am also looking for a train from Cambridge to Ely, could you help me find one? Sentence11: You're welcome, have a great day. Sentence12: Price is 3.52 pounds. Duration is 17 minutes. Sentence13: Yes, i would like to leave Saturday after 11:30 Sentence14: What is the entrance fee and the address? Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: No, but I would like to find a cheap priced south african restaurant. Sentence2: I'm sorry, but we don't have and South African restaurants in the area. Is there a different type of food I can help you find? Sentence3: I would say let's look for an attraction first. Can you recommend something to do in the south part of town? Sentence4: I will go with whatever you recommend, I just need the attraction type and postcode. Sentence5: Hi, I am looking forward to trying some of your local restaurants. I do need help with some other places to go in town while I am there though. Sentence6: There are several nice parks in the area as well as theaters and museums. Sentence7: The byard art museum postal code is cb21sj. Can i help you get transportation to and from the museum? Sentence8: Try Portuguese then. Sentence9: Thanks so much for putting up with me! You've been great! Sentence10: 3 people will be dining. Please give me a reference number once you finish the reservation Sentence11: I would rather be in the south area. Sentence12: What is your food type preference? Sentence13: There are two results. Both are cheap. Do you prefer the south or centre? Sentence14: I have finished booking it for Thursday at 12:15 for 3 people at Nando, your reference number is TDQZGM38 . Do you need anything else? Sentence15: Can you book a table for me there on Thursday at 12:15? Sentence16: The only option is nandos. Sentence17: You are welcome enjoy Sentence18: How many people are in your party? Question: Who has spoken the sentence 15? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: Yes, I would like to book this. There are 5 people that will be staying for 4 nights starting Saturday. Can I get a reference number? Sentence2: I would like to take a train to leave cambridge. Sentence3: I need a guesthouse that has free wifi Sentence4: Thank you very much. That is all. Sentence5: TR0797 leaves cambridge at 19:34 and arrives in peterborough at 20:24. Would you like to book tickets for this train? Sentence6: There are 12. Is there a star rating you would like? Sentence7: The TR3347 meets your current criteria, but you have a lot of options. Would you like to narrow it down further by departure time or arrival time? Sentence8: Your hotel has been booked. Your reference number is ZNMV4ENM . Can I be of further assistance? Sentence9: Your booking was successful. The total for 5 people is 82.5 GBP and your reference number is 4G3J82OG . Is there anything else I can help with? Sentence10: Yes please. I need tickets for 5 people and a reference number. Sentence11: Honestly, I always stay at the same place when we travel there, so I could really use a recommendation. Any one will do just with wifi and moderate pricing. Sentence12: There are lots of options. What area would you like to stay in? Sentence13: I need to arrive by 20:30. Sentence14: I would recommend the Kirkwood House. It is located in the north. It has 4 stars and free parking and wifi. They are located at 172 Chesterton Road. Sentence15: You're welcome, I was glad I could help. Don't hesitate to contact us if you think of anything else you need. Sentence16: I have 1,414 trains that are departing Cambridge this week. What day will you be traveling on? Sentence17: I'm not picky. Where would you recommend that is in the moderate price range? I'll need free parking, too. Sentence18: I'm going to peterborough on wednesday Question: Who has spoken the sentence 10? (A) User (B) System

Ex Output:

Answer: (A) User