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 about moderate priced guesthouses that are 4 stars? Sentence2: Sure, please provide the address and phone number as well. Sentence3: Yes, how about the acorn guest house? Sentence4: I'm sorry, I would prefer an expensive guesthouse that includes free parking. Sentence5: I'm sorry. I'm not finding any results that meet your criteria. Would you like to try a different hotel type or price range? Sentence6: The Acorn Guest House is a very popular hotel. Their phone number is 01223353888 and address is 154 chesterton road. Would you like to book a room? Sentence7: Yes, the phone number is 01223352607. Sentence8: Could I get the address as well? Sentence9: It looks like there aren't any 4 star guesthouses that are expensive. Would you like me to try a different star rating or price? Sentence10: I'm looking for an italian restaurant that is moderately priced. Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is G9YTGB8M . Do you need anything else? Sentence12: how about a moderate price range? Sentence13: Stazione restaurant and coffee bar is available Sentence14: I'm looking for an expensive guesthouse with a 4 star rating which provides free parking. Is that possible? Sentence15: Could you give me the address and phone number of both please? Sentence16: The address is Market Hill City Centre. Is there anything else you need? Sentence17: No thank you I don't need reservations today. Sentence18: Is there anything more I can assist you with today? Sentence19: No. All set. Thanks. Sentence20: Thank you for contacting us and have a nice day. Sentence21: We have 9 moderately priced guesthouses that are 4 stars and provide free parking. Would you like a recommendation from me? Sentence22: I would like to book a table there for 6 people at 11:00 on sunday. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User