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 please, for Thursday, 7 people at 16:45. I also need a reference number. Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 2FX5XCUM . is there anything else i could help you with? Sentence3: It doesn't matter but it should be expensive and it should be in the centre. Sentence4: Yes, we would like American type food. Sentence5: Sure, what kind of restaurant? Sentence6: Okay and what time would you like to arrive? Sentence7: We actually have different categories of american food -- latin american, modern american, north american, and "the americas." Which of these would you prefer? Sentence8: How about latin america? Sentence9: I'd like to depart Cambridge after 21:30. Sentence10: How about North American cuisine instead? Sentence11: That is all I will need. Thank you. Sentence12: I'm sorry. I have no results that meet your criteria. Would you like to try a different food type, price range, or area? Sentence13: excellent, have a great day! Sentence14: Gourmet Burger Kitchen is expensive and in the center. Would you like to book a table? Sentence15: Yes please book that for me. Sentence16: I also need a train. Going to Ely Friday. Sentence17: Booking was successful, the total fee is 4.4 GBP payable at the station .Reference number is : ZC86HRQ4 . is there anthing else i can do? Sentence18: The train TR9842 is leaving Cambridge on Friday at 21:50. The cost is only 4.40 pounds and the travel time is 17 minutes. Would you like me to book? Sentence19: I am looking for information in Cambridge. looking for a restaurant. Sentence20: Do you have any cuisine preferences? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System