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: Is it in the moderate price range? If so, yes. Sentence2: I'd be happy to help you find something. Is there an area you prefer? And do you want a hotel or guesthouse? Sentence3: And for how many days? Sentence4: Are there any cheap guesthouses in the centre of town? Sentence5: I would recommend el shaddai. Would you like a reservation? Sentence6: Yes, that will work! I need the reference number please. Sentence7: There are 7 trains that fit your criteria. The first one after 10 is the TR8377, leaving Cambridge 11:21, arriving Stevenage 12:10. Would you like to book a seat? Sentence8: I'm sorry there are no moderate guesthouses in the centre, maybe another area perhaps? Sentence9: There will be 2 people and we will arrive on Monday. Sentence10: I'm sorry, 5 nights please. Sentence11: Thank you so much! That's all I needed. Have a great day! Sentence12: Please give me your departure site and your destination station. Sentence13: I definitely want both a guesthouse and the centre of town. Sentence14: Yes, I've located Alexander Bed and Breakfast that is a 4 star and El Shaddai that is a 0 star. Do you have a preference? Sentence15: Good News! I got the Alexander Bed and Breakfast in 56 saint barnabas road cb12de, phone number 01223525725. The reference # is 3MWI64S9 . Sentence16: Great. I also need a train leaving on Saturday. Sentence17: I would like to try another price range, only in the moderate range. I would like to stay in the city centre. Sentence18: no preference I also need a reference number. Sentence19: I am going to cambridge and need a place to stay. Sentence20: Booking was successful, the total fee is 10.24 GBP payable at the station . Reference number is : Y5AV9STN . Sentence21: Have a nice day then, and goodbye. Sentence22: It is not in the moderate price range, would you like to try another area or a different price range perhaps? Sentence23: What day would you like to stay and how many people will be staying? Sentence24: The train should leave after 10:00 and should go to stevenage, leaving from cambridge. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System