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: Thank you. Is there anything else? Sentence2: It is in the centre, not the west. Sentence3: No that's it, thank you. Sentence4: Okay, what time do you need to leave? Sentence5: Sure, I need a reservation for 4 people and 3 nights starting on Saturday. Sentence6: Thank you so much! Sentence7: I need to leave the restaurant by 09:15 to go the hotel. Can you book a taxi for me? Sentence8: Thanks again for using our service, enjoy your stay! Sentence9: I was able to reserve that for you. Your reference number is 28PZGFFT . Sentence10: Sala thong is a great thai restaurant on the west side located at 35 Newnham Road Newnham. Do you need any more information? Sentence11: There is bangkok city in the centre would you like me to make you a reservation? Sentence12: Are there any expensive thai paces in the area? Sentence13: Is that in the west? Sentence14: Booking completed! Booked car type : yellow volvo Contact number : 07044362431 Can I help with anything else? Sentence15: What postcode is that? Sentence16: I need something in the West Sentence17: The gonville hotel is in the city centre. It is expensive, and has 3 stars. Free internet and parking. Address is gonville place. Can I get you a booking? Sentence18: cb39ey. What else may I do for you? Sentence19: I also need a taxi that will leave the restaurant by 09:15 Sentence20: I would like information on the Gonville hotel. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User