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: Okay. Glad I could be of help. Sentence2: Thank you. Sentence3: I have found Shiraz Restaurant located at 84 Regent Street City Centre, would you like me to book you a table? Sentence4: Great, thanks. I think that's all I needed. Have a good day. Thanks. Sentence5: TR3130 leaves Birmingham New Street at 17:40 and it arrives in Cambridge at 20:23. The price is 75.10. The travel time is 163 minutes. Sentence6: Thank you for contacting Cambridge TownInfo centre. I hope you have a pleasant trip! Goodbye! Sentence7: Sure, the postcode is cb21dp. Is there anything else I can help you with today? Sentence8: No problem. For what day? Sentence9: Monday, and I need for it to arrive by 21:15. Sentence10: No thanks, I just need the postcode. Sentence11: Can you give me the departure time, travel time and the price? Sentence12: TR3130 will arrive by 20:23 if that works for you? Sentence13: I am also looking for a train from birmingham new street to Cambridge. Sentence14: I want to find a place called Shiraz Restaurant please. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User