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

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: Yes, I need one in the cheap price range please. Sentence2: departure is sunday from ely. Sentence3: I'll book the one that leaves at 17:35. What time does the train arrive? Sentence4: Pizza hut city centre, ask, and zizzi cambridge all are italian restaurants in the centre part of town in the cheap price range. Would you like me to book one? Sentence5: No. Everything is perfect. Thank you for your time. Sentence6: I found four trains, one leaves at 17:35, 19:35, 21:35 or 23:35. Which would you like to book? Sentence7: I have reserved a table for three at 21:00. The reference number is OUN5OI0K . Sentence8: I need a train ticket to Cambridge, sometime after 15:45 if you can find one. Sentence9: There are 3 gastropubs in the centre. 2 are expensive the other is moderate. Do you have a preference in the price range? Sentence10: No. I'm looking for a a gastropub restaurant in the centre. Sentence11: There are no gastropubs in the centre part of town in the cheap price range. Would you like something else? Sentence12: It arrives at 17:52. Shall I go ahead and book it for you? Sentence13: Thank you for using this system! Sentence14: There are over 600 trains to Cambridge that leave after 15:45. Can you tell me the day you're traveling and your departure station? Sentence15: Yes. Can you please book Zizzi Cambridge for 3 people at 21:00 on the same day, Sunday. Sentence16: Ok, how about one serving italian food? Sentence17: That's an interesting question, but unfortunately I haven't that information. Is there anything else I can help you with, though? Sentence18: Finally. Thank you. Pizza Hut. I ate there when I was a kid. It's a long story. I wonder if this one has a jukebox. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User