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, is either of these hotels located in the north? Sentence2: What type of attraction would you like to visit? Sentence3: the phone number is 01223366611 and adress is gonville place Sentence4: No worries, I just need the address please. Sentence5: The pricerange for Gonville Hotel is expensive. Were you needing a guesthouse? This is a hotel. Sentence6: There are 2 hotels with 3 stars. They are both quite similar, but the Gonville Hotel has a little better reputation. Can I tell you anything about it? Sentence7: May I have the phone number and the exact area. Sentence8: Sure! I recommend the Clare Hall located on Herschel Road. What information would you like to know? Sentence9: The Alpha-milton guest house address is 63 milton road, postcode cb41xa. Are you looking for an attraction in the north also? Sentence10: Thank you, please provide what time you want to leave the hotel or time you want to arrive at Clare Hall. Sentence11: I think we're confusing each other. You said there was no 3-star hotel in the north, so I'm looking for a 3-star guesthouse in the north. Do you have that? Sentence12: Sorry. My system just refreshed. Alpha-milton guest house is a 3 star guesthouse in the north area in the moderate price range. It does not include internet or parking. Sentence13: How about a guesthouse with a 3 star rating in the north? Sentence14: I need the address and phone to them please. Sentence15: Thanks! I will also need a taxi please. Sentence16: There are two 3-star guesthouses in the north. One offers Internet and parking and the other doesn't. Would you like to book a room at one of these? Sentence17: I need a hotel to stay with a 3 star rating please. Sentence18: I am actually looking for a college anywhere in town. Can you recommend an interesting one? Sentence19: On second. Wait. What was the price range on that guesthouse? Sentence20: No they are located in the centre and the south. Sentence21: Clare hall is in the west part of town. Their phone number is 01223332360 should you need to contact them! Sentence22: No, thanks. I'm also looking for places to go in town. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System