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

Example Input: 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
Example Output: Answer: (A) User

Example Input: Sentence1: El Shaddai is a guesthouse. Anything other questions about them? Sentence2: Yes, they have free parking. Would you like me to book you a room? Sentence3: Whoa whoa, easy there tiger, Lets narrow the search down first. In the center, 0 stars, cheap and it can be a hotel or guesthouse. Sentence4: Yes I need a chinese restaurant. Sentence5: ok for how many people and when are you planning your stay? Sentence6: I am looking for a restaurant that sell seafood,will prefer one in the center of the city. Sentence7: ok what location? Sentence8: Do they have parking? Sentence9: Yes, I'd like to travel on Wednesday. I'll need to arrive by 8:00. Sentence10: It should be in the same area? Sentence11: I would like a train into Cambridge from Stevenage. Sentence12: Is El Shaddai a guest house or hotel? Sentence13: OK. Is there anything else I can help you with today? Sentence14: No. That's everything I needed and then some, actually! Thanks, take care! Sentence15: Okay, is there anything else I can help you with? Sentence16: No, I don't need a chinese restaurant after all. Thanks for looking. Sentence17: All set. You are booked for 7 people on TR9448. You reference number is B1Q6DDTE . Can I help with anything else? Sentence18: i only have one option can i book it for you? Sentence19: No, I don't need to. I was just curious about it. Thank you for all of your help. Sentence20: The TR9448 arrives at 06:43. Would you like me to book a ticket for you? Sentence21: Yes, I need a hotel as well. Sentence22: Is there a specific day and time you would like to travel at? Sentence23: I'm sorry, there seems to be an error. Can you please restate your request? Sentence24: How about el shaddai? Fits your request perfectly. Sentence25: Thank you for calling. Have a great day! Sentence26: Yes, please book 7 seats. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: There is only one train traveling from Cambridge to Stevenage on Thursday close to 23:30. It is the TR8239, would you like for me to book you a ticket? Sentence2: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence3: Thank you so much, no need for booking, that is all of my questions. Sentence4: I need a train from Cambridge to Stevenage please. Sentence5: Yes, please. I'll actually need 7 tickets. Sentence6: Perhaps with different criteria? I have nothing for 0 stars, expensive, in the centre. Sentence7: I'd like to leave on Tuesday after 21:30, please. Sentence8: How about cheap price range? Sentence9: I also need an expensive lodging in the center of town. Sentence10: I was able to reserve 7 tickets for you. Your total fee is 89.6 GBP and your reference number is BRQC79TR . Do you need anything else? Sentence11: Okay, once you've found a hotel, could you give me the hotel type, post code and whether or not they have free parking? Sentence12: Hmm, I was really looking for something with 0 stars. Can you check for any guesthouses instead? Sentence13: I have 4 trains for those locations. What day and time were you looking for? Sentence14: I'm still looking, please stand by. Sentence15: The el shaddai is a guesthouse with free parking. The postcode is cb11eg. Sentence16: I found 2 hotels, the gonville hotel, 3 stars, and the university arms hotel, 4 stars. Which do you prefer? Question: Who has spoken the sentence 12? (A) User (B) System
Example Output:
Answer: (A) User