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

Ex Input:
Sentence1: Booked! You leave at 13:17, your reference number is 3WICPFQP, you will pay 141.6 at the station. Sentence2: I am looking to book a train. Sentence3: Could you tell me your location, which area of town or what business you are departing from? Sentence4: Certainly. May I ask where you want to depart from? Sentence5: I need to depart from London Kings Cross and go to Cambridge. Sentence6: We are leaving London Kings Cross and need to do so after 12:45 on Friday for 6 people and can I get the reference number for the booking? Sentence7: Okay thank you. That is all I need. Sentence8: Okay thank you for calling. Sentence9: I would like to leave from the closest station to my location. Sentence10: To clarify, are you looking for a train to Cambridge? All Friday trains from London Kings Cross go to Cambridge. Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Goodbye. Sentence2: Nandos sounds great. Thank you. Sentence3: Goodbye. Sentence4: thank you good bye Sentence5: Yes, I'd like a restaurant that serves portuguese food. Sentence6: nandos is the only restaurant i can find in the south that serves portuguese. Sentence7: Hi. I'm trying to find a good restaurant in the south part of town. Sentence8: There are several good restaurants in the south part of town. Do you have a preference for the type of food or price range? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Actually it should be in the moderate price range. Sentence2: You might like City Harvest. It's a very popular modern European restaurant. Sentence3: No that was all I needed. Sentence4: your booking was successful. Confirmation # is AJANORT5, anything else today? Sentence5: Can you book it for me for 3 people at 14:00 on Wednesday? Sentence6: Yes, that is fine. I also need a place to stay that has free parking and at least a three star rating, can you find one for me? Sentence7: I found no hotels that are in the cheap price range like the restaurant. Is there another price range or star rating you would consider? Sentence8: i need one to be the same price range as the restaurant. Sentence9: If you need anything else contact our help desk anytime. Have a good day. Sentence10: yes, i have 5 that meet that criteria. Sentence11: Would you like to try Hamilton lodge? Sentence12: Hello, I'm looking for a modern European restaurant. Got any? Sentence13: I'm sorry, that restaurant seems to have closed. I can reserve a table at The River Bar Steakhouse and Grill if you'd like. Sentence14: Yes. I will need it for three nights, 3 people starting Wednesday. Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:
Answer: (B) System