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: It doesn't look like any of them are available for that day. Would you like to try another day or a shorter stay? Sentence2: Yes, I have 3 in the moderate price range Sentence3: Are you looking to stay in a specific area? Sentence4: Not really. Can you see if any of them are available for 4 nights starting from Thursday? It's for 5 people. Sentence5: Please try for 12:30. Sentence6: You're welcome. Sorry I had such a hard time booking for you! Sentence7: I would recommend the Rice House as there food is delicious. Would you like me to make you a reservation? Sentence8: No, that is all I need. Thank you! Sentence9: I sure can. Any preference on time? Sentence10: Well, maybe you'll have better luck finding me a place to stay. I'm looking for something cheap, but still 4-star quality. Sentence11: I have 8 that fit those parameters, would you like any special amenities? Sentence12: Okay I would like to book a table for 5 people at 12:30 on Sunday. Sentence13: Cheap price range, please! Sentence14: Man, we are just not having much luck tonight, huh? Okay, can you see if there are any available for one night? Sentence15: Don't sweat it. Thank you and Goodbye. Sentence16: I was not able to book that either. I am very sorry. Sentence17: Okay please check at 11:30 instead. Sentence18: Sorry, there are no available spots for that day and time. Would you like to try another time? Sentence19: Unfortunately, I can't find any tables available for that day and times either. Would you like to try a different part of town? Sentence20: That was unsuccessful. Would you like to try another time? Sentence21: Any other Chinese restaurants in a different price range? Sentence22: Great! Can you book me a table for 5 on Thursday? Sentence23: I was able to book you at Charlie Chan's. Your reference # is ZWMR0D97 . I also found you a room at Worth House for 1 night. Reference # is 0HEBRY1Y . Sentence24: It was my pleasure. Enjoy your stay! Sentence25: Only other thing I would like is free parking. Sentence26: Hello! Are there any chinese restaurants in the centre? Sentence27: Any of those options would be fine Sentence28: No, I'm sorry, those are the only 3 in the centre, would you like to try a different type of restaurant? Sentence29: There are quite a few in the centre. What is the price range you'd like to stay within? Sentence30: jinling noodle bar is a good fit. Its on 11 Peas Hill City Centre Sentence31: All right, just for fun, let's try one of those (though I expect they will not work either!). Sentence32: Yes let's try making a reservation for 5 people on Thursday at 12:30. Sentence33: No, a moderate restaurant isn't really what I wanted. Can you find a cheap Chinese restaurant for me? Sentence34: If you can book me a table for 5 at one of the other cheap Chinese restaurants at 12:30 (or 11:30) on Thursday, that would be fine. Can you try that? Sentence35: I apologize, there are no reservations at that time. Would you like to try another time at Rice House, or perhaps I can attempt Charlie Chan or Golden House? Sentence36: I have 3 cheap chinese restaurants in the centre of town. The Charlie Chan, The Rice House, and the Golden House. Do you have a preference? Sentence37: When booking your restaurant, I see that the jinling noodle bar is moderately priced. Would that work? Sentence38: Ok. Let's try Charlie Chan instead. Sentence39: No it must be in the Centre. Is there any other chinese place open in the Centre on Thursday? Sentence40: I am sorry. The 11:30 booking for the rice house was unsuccessful. Would you like me to try a different restaurant? Sentence41: Thank you. that is all for today. Sentence42: you're welcome, anything else i can help you with? Question: Who has spoken the sentence 27? (A) User (B) System
Output: 


Answer: (B) System