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: Ok, great! I have train TR7423 departing cambridge at 05:00 and arriving at london kings cross 05:51 on Sunday. Would you like me to book this for you? Sentence2: Have a wonderful day. Sentence3: I sure can. What day are you traveling and what is your departure city and destination? Sentence4: Yes, please. Can I get six tickets and a reference number once it's booked? Sentence5: I'm leaving sunday from cambridge going towards london kings cross. Sentence6: I am traveling on Sunday. Sentence7: I have 70 trains leaving cambridge and going to london kings cross. What day would you like to travel? Sentence8: Do you have a preference as to which part of town the college is located? Sentence9: I am also looking for train schedules. Can you help me with that? Sentence10: Your booking was successful. The reference number is 2VRW842P . Is there anything else I can help you with today? Sentence11: I'd prefer somewhere in the west. Sentence12: I need to find a college in town. Sentence13: Churchill college is in the west part of town. Sentence14: No,thank you very much. Sentence15: Can you tell me their address and postcode, please? And do they charge any entrance fee? Sentence16: The address is storey's way postcode cb30ds. Their phone number is 01223336233. Entrance to the college is free. Is there anything else I can help you with? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System