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, I think that's all that I'm looking for. Thank you very much for the help. Sentence2: no, just the postcode Sentence3: That should be fine, can you book that on thursday to cambridge? Sentence4: Sure, the postcode of the Scott Polar Museum is cb21er. Is there anything else I can help you with today? Sentence5: hi am looking for a train leaving broxbourne at 11:00. Sentence6: There are no trains leaving at exactly 11:00. Is a train leaving Friday at 11:32 okay? Sentence7: You're welcome. Enjoy your time! Sentence8: One ticket, please. Sentence9: Thank you so much for the assistance! Sentence10: Excellent. I hope you have a great time! Sentence11: The price of the ticket is 17.90 pounds, shall I book it for you now? Sentence12: Okay you're all set for your train ticket. Also the Scott Polar Museum is free! Would you like their address or phone number? Sentence13: Yes, I can. How many tickets do you require? Sentence14: Yes, please. I'm also looking a ticket to the Scott Polar Museum Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User