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: How many tickets would you like? Sentence2: Ok, is there anything else I can help you with today then? Sentence3: Yes please, go ahead and book that. Sentence4: Yes, I also need to book a train to Kings Lynn that leaves after 8:30 on wednesday departing cambridge. Sentence5: I need a guesthouse in the north to stay at. Sentence6: And how many will be staying? Sentence7: That was all thank you. Sentence8: THe first train after 08:30 is TR2831, it leaves at 09:11 and arrives at 09:58, I can book you if you like. Sentence9: I was able to book that for you. Your reference number is X5NGAVNB . Anything else I can assist you with? Sentence10: Does it have free parking? Sentence11: Three people, 4 nights, thanks! Sentence12: I do not need to book. Sentence13: No it does not. How about the Hamilton Lodge guesthouse? It is moderately priced and has 3 stars. Would you like me to book it for you? Sentence14: Yes please. I need it for saurday, sunday, monday and tuesday please. Sentence15: Alright how does the avalon guesthouse sound? Sentence16: You are welcome! Enjoy your stay. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System