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, just the area and postcode please. Sentence2: Price range is not important, just the four stars. Sentence3: Yes, it has free internet. Would you like me to book it for you? Sentence4: As long as it has free parking, that's all I really need. Can you recommend one and tell me a little about it? Sentence5: Thank for calling today. Goodbye! Sentence6: It does not matter but I would like free parking. Sentence7: Nope. That's all. Goodbye. Sentence8: What price range would you like? Sentence9: I'm leaving Cambridge and headed to Ely. Sentence10: I have several guesthouses with 4 star ratings. Is there a particular area you'd like to be in? Sentence11: Where are you departing from and what is your destination? Sentence12: I am also looking for a guesthouse with a rating of 4 stars. Sentence13: it is in the north area and the post code is cb41da. would you like to make a booking? Sentence14: There is a train to Ely that leaves at 17:50 on Monday. Would you like me to book it? Sentence15: No, thanks. I'm not ready to book at this time. Sentence16: What area of town would you like? Sentence17: No, I just need the train ID and arrival time. Sentence18: I have 5 guesthouses with free parking. I recommend the Acorn Guest House in 154 Chesterton Road, postcode cb41da. Sentence19: Sure the train id is TR4294 and the arrival time is 18:07. Sentence20: Can i help you with anything else today? Sentence21: Does it have free internet? Sentence22: I'm looking for a train that leaves on monday after 16:15. Any suggestions? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System