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: How many people will be staying? Sentence2: Your booking for the Aylesbray Lodge Guest House has been confirmed. Your reference number is 8GO1Q7PM . Can I help with anything else? Sentence3: It will be 4 people and 3 nights starting from Friday. Sentence4: Yeah could you please book one of those for me? Sentence5: Thank you! Have a great day! Sentence6: There are five entertainment attractions in town, two in the east, two in the south, and one in the west. Is there a particular area of town that you prefer? Sentence7: Can you try looking in the south then? Sentence8: I also need a hotel in the Centre in the moderate price range with free parking. Sentence9: I'm looking for some entertainment for later. Sentence10: You too, enjoy your stay in Cambridge. Sentence11: I don't have any that match your criteria, I'm sorry. Sentence12: I would recommend the nusha. I do not know what the entrance fee is. You may call 01223902158 to check. Do you need anything else? Sentence13: That is all, thank you. Sentence14: Yes. Please tell me the one you like best and then how much that place costs to get in. Sentence15: Yes, I'd like to stay in the south part of town please. Sentence16: I need a hotel for people for 3 nights starting Friday. Sentence17: There are two results, they are both gueshouses.There's aylesbray lodge guest house, 4 stars, and bridge guest house, 3 stars. Can I book one for you? Sentence18: There are two options: Nushua and Tenpin. Both are located at Cambridge Leisure Park on Clifton Way. Would you like the phone number for either of them? Sentence19: When would you like to book the room and for how many nights and people? Sentence20: welcome and thanks for using our services Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User