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: The Ugly Duckling's phone number is not available but their postcode is cb21tw. Where will you be departing from? Sentence2: No, but if you could give me the price of a ticket? Sentence3: My favorite is the Ugly Duckling, located at 12 St. Johns Street City Centre. They don't seem to have a phone number, so would you like a different restaurant? Sentence4: I am not familiar with Cherry Hinton Road. Is that in the Centre of town? Sentence5: There are 31 available trains, do you have a more specific time in mind to help narrow them down? Sentence6: There are 31 trains available, what departure time would be best for you? Sentence7: We have 4 expensive chinese restauarants in the city centre. Would you like reservations? Sentence8: I will be departing from Peterborough after 8:30. Sentence9: Great. That's all the information I need now. Thanks! Sentence10: The first train that leaves after 8:30 would be nice. Sentence11: No thank you, can you just give me the address and phone number for one of them? Sentence12: I need to be in Cambridge on Saturday. Sentence13: We have 57 options available, do you have a preference on cuisine or location? Sentence14: Yes, I would like some Chinese food, please. Sentence15: What is your destination? Sentence16: I would like to find an expensive place to eat please. Sentence17: You're welcome, goodbye! Sentence18: Yes please. I would like something in the expensive price range. Sentence19: Ok. That train is TR1616 which leaves at 08:48. Would you like for me to book your seats? Sentence20: It is 13.20 pounds. Sentence21: No, actually they are located in the south. Did you want me to check for what is available in the centre instead? Sentence22: There are 9 options. The Good Luck Chinese Food Takeaway is located at 82 Cherry Hinton Road, Cherry Hinton. Would you like to reserve a table? Sentence23: Yes please give me the post code and phone number for one of the restaurants that has them listed. I am also looking for a train. Sentence24: Any time after 08:30 would work. Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User