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: There are several choices. The ride is about 79 minutes long. Can I make a reservation for you? Sentence2: I have you booked and your confirmation number is PUQ990A7 . Can I help you further? Sentence3: stazione restaurant and coffee bar italian is in centre area. it is expensive. their telephone number is 01223352607, code cb23njand is located inMarket Hill City Centre. Sentence4: Okay. That sounds good. Can you tell me more about a restaurant called stazione restaurant and coffee bar. Sentence5: No, I do not have a specific arrival time. Sentence6: I have several, is there an arrival time you prefer? Sentence7: Sure. Can you confirm the day you would like the booking? Sentence8: I'm looking for a train from norwich to cambridge. Sentence9: Can you book a table for 5 people at 17:45 for Stazione, please? Sentence10: Yes. I need that booking for Sunday. Sentence11: I am not sure. Do you have one leaving after 9:15 on sunday? Sentence12: Have a great day! Sentence13: Okay, how about TR0996, leaving at 09:16 and arriving by 10:35? Sentence14: I think that is all I needed today. Thank you! Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User