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: If you decide you need something else please contact us. Enjoy your trip. Sentence2: I've got a train that will arrive at 16;07 or if you prefer earlier, 14:07. would you like me to book one of those for you. Sentence3: As long as I am there by like I said earlier, 17:15 so yes the 16:07 will work for me. I am also looking for attractions in south Sentence4: I don't need to book any train tickets, thanks. What attractions do you recommend in the south? Sentence5: That won't work I need to arrive by 17:15. Sentence6: I can get you on a train leaving Cambridge at 17:50. Sentence7: I have the TR1549 leaving at 17:50 and it will be arriving at 18:07 is that a little better for you? Sentence8: should depart from cambridge at 17:15 Sentence9: No, that's it for today. Thanks for your help. Sentence10: There are 8 attractions in the south. I would recommend the Byard Art museum which has free admission. Do you need a booking , or need help with anything else? Sentence11: No that still won't work. Is there anything earlier please? Sentence12: How many tickets would you like to book? Sentence13: I am looking for a train to ely on wednesday. Sentence14: Where are you leaving from? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System