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: No, I am all set. Thank you for all your help. Have a nice day. Sentence2: maybe you can suggest a place close to the area of south, I would appreciate that, thank you Sentence3: I need to find a place to stay while in Cambridge, I do not need it to have internet but I do need it to have free parking. Sentence4: Alright, can you get me a taxi that will take from from the hotel to the Varsity in time for my reservation? Sentence5: Yes let's try another restaurant. Sentence6: I don't have a preference. Sentence7: I am also looking for a restaurant in the same area. Preferably vegetarian food in the moderate price range. Sentence8: Can you try for 12:00? Sentence9: Thank you for using our service. You have a great trip! Sentence10: Yeah, I do. What about to the west? Sentence11: Ok. How about the Bridge Guest House. I'm happy to book that for you. I just need to know what day you'll be arriving. Sentence12: There are 4 hotels in the south with free wifi and parking. What star rating would you like? Sentence13: There are currently no hotels in the Cambridge area that have parking, is there another area close by that would work for you? Sentence14: I don't really care about the star rating. I just would like free wifi and would need to book for 3 nights for 6 people. Sentence15: Sure, can I please get a table on Sunday at 13:00 for 6 people at The Missing Sock? Sentence16: Yes, be on the lookout for for a white lexus. The contact number is 07672513904. May I help with anything else? Sentence17: The Varsity Restaurant is moderately priced, and serves international food, but I'm afraid it's not in the south, but rather the city centre. Would that be agreeable? Sentence18: Sure please book that fro me. Sentence19: I need the hotel to at least have free wifi. Can you accommodate? Sentence20: Okay. Is there one that serves International food? Sentence21: Booked for 12 at varsity restaurant, you reference number is SSRYQGZ2 . Your table will be reserved for 15 minutes. Sentence22: what price range are you looking for? Sentence23: There is nothing in the south. Do you really need parking? Sentence24: I cannot not book your reservation for the time you wanted, would you want another time or to try one of the other 2 restaurants? Sentence25: What are the preferences you have for the hotel? I cannot seem to find one fitting the criteria you have listed. Sentence26: I will be arriving Sunday. Sentence27: I'm sorry 12:00 is not available either, would you like to try another time or different restaurant possibly? Sentence28: All booked! The reference number is O59MRSHK . Sentence29: there are no vegetarian food restaurants. Sentence30: There are three locations that serve international cuisine. The Missing Sock, The Varsity Restaurant, and the Bloomsbury Restaurant. Are you interested in any of these? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User