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 thank you. Please tell me about the ticket pricing and time of travel Sentence2: What price range and what star rating are you looking for ? Sentence3: Thank you for using the Cambridge TownInfo Centre. Have a great day! Sentence4: TR0254 Leaves at 05:40, would you like me to book that for you? Sentence5: Please book 6 tickets and send me the reference number. Sentence6: Thank you for all your help. Sentence7: I would like to stay in the centre of town please. Sentence8: That is all that I need. Sentence9: I'm looking for a train that goes to Cambridge and arrives by 08:45. Sentence10: Yes please. I need a 3 star hotel that offers free wifi Sentence11: The price is 75.10 pounds and it is a 163 minutes ride. Can I help you with anything else? Sentence12: I found 231 trains that fit your request. Where will you be departing from? Sentence13: I found two expensive hotels, one in the centre and one in the south of town. Do you have a preference? Sentence14: Okay there are two options, the gonville hotel and the lensfield hotel Sentence15: You are quite welcome. Is there anything else I can assist you with? Sentence16: The postcode is cb11ly. Sentence17: I will be departing from Birmingham New Street on Tuesday. Sentence18: please just send me their postcode. thank you Sentence19: I want the hotel located in the centre, as I stated before. Sentence20: I would prefer a 3 star rating, price range isn't important. Sentence21: The Gonville Hotel is in the centre of town. Would you like me to book a room or is there anything i can assist you with? Sentence22: Booking was successful, the total fee is 450.6GBP payable at the station . Reference number is : G368B2VI. Can I help with anything else today? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User