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

Ex Input:
Sentence1: My destination is cambridge. Sentence2: What day will you be traveling? Sentence3: Hey. I'm looking for a train from stansted airport. Sentence4: What is your destination ? Sentence5: I plan to go on tuesday. Sentence6: How many tickets would you like? Sentence7: There are trains departing every hour. TR5077 would get in in at 8:52, does that work for you? Sentence8: That sounds perfect. Can I get the reference number from the booking? Sentence9: I would like 4 tickets. Sentence10: Booking was successful, the total fee is 40.4 GBP payable at the station. Reference number is : WWW231NO . Is there anything else you need? Sentence11: There are several. Do you have a time you need to travel specifically? Sentence12: The train should arrive by 10:00 if at all possible. Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Where did you want to get on the train? Sentence2: Alpha-Milton Guest House is 3 stars with no internet or parking. Would you like to book a room there? Sentence3: Okay, there are lots of choices. What time of day would you like to travel? Sentence4: I'd like to book it for 4 people and 2 nights starting Monday. I need the reference number as well. Sentence5: Yes, I am looking for a place to stay. I would prefer to stay in the North at a 3 Star location. Sentence6: No, I don't need assistance with the booking. Can you tell me the cost of the ticket though? Sentence7: I show 2 option, both in the moderate price range. Do you need parking or internet? Sentence8: TR7940 will get you there by 20:38, would you like me to book it you some tickets? Sentence9: Yes, I need a train to get me to Cambridge on Monday. Sentence10: The cost per ticket is 16.50 pounds. Can I assist you with anything more? Sentence11: Neither of those matter, but I would like it to be a guesthouse. Do one of those match? Sentence12: No, that's everything. Thank you. Sentence13: You're welcome! I hope that you enjoy your stay in Cambridge. Have a nice day. Bye. Sentence14: Fantastic, your reference number is T2AUGQ7S . Is there anything else you need today? Sentence15: I need to get there by 20:45. Sentence16: I will be departing from peterborough. Question: Who has spoken the sentence 8? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: You're welcome. Is there anything else I can help you with? Sentence2: I have made that taxi reservation. Look for a yello skoda and the contact number is 07041247281. Sentence3: Tandoori palace looks like a good fit for you. Could you like me to make a reservation? Sentence4: Not just yet but please get me their post code, phone number and address Sentence5: Yes, can you tell me if there are any concerthalls in the west? Sentence6: It was a pleasure helping you today. Good-bye. Sentence7: Thank you! Just give me the postcode and I should be good to go. Sentence8: They are located at 68 Histon Road Chesterton. Their phone number is 01223506055 and their postcode is cb43le. Anything else I can help you with? Sentence9: Awesome. Can I get a taxi from the College by 12:15? Sentence10: No, I'm sorry. The search didn't pull up any matches. Sentence11: Okay the postcode is cb30ds. Sentence12: I'd love to help! Where are you going? Sentence13: I want to find a restaurant in the west that serves light bites. Do you have any suggestions? Sentence14: What are some expensive restaurants? Sentence15: What about a college? Sentence16: I'm sorry, there are no concert halls located in the west, shall I check another area? Sentence17: I'd like Indian food, please. Sentence18: Okay, how about Churchill College? It's free to get in. Sentence19: I'm headed to Tandoori Palace from the College. Sentence20: No thank you! That will be all! Sentence21: There are a few choices in the expensive pricerange on the west side. What type of food would you prefer other than light bites? Sentence22: Thank you for booking that taxi and giving the contact number and car type. Question: Who has spoken the sentence 9? (A) User (B) System

Ex Output:
Answer: (B) System