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: Unfortunately, I am not able to find any Australian cuisine in Cambridge? Can I look up another type of restaurant for you? Sentence2: Yes, please book it for me. Sentence3: Would you like to go to milton country park? They are located in the north and the entrance fee is free. Sentence4: Let's make it for six people at 15:00 on saturday. Sentence5: Hmm, I'll try asian oriental instead. Sentence6: What day and time should I make the reservation for? How many people? Sentence7: No, I apologize there are no Australian restaurants in Cambridge. Would you like to try another type of cuisine? Sentence8: Booking was successful. The reference number is 30D245LZ . Anything else I can do? Sentence9: you are very welcome. thank you for using our system. Sentence10: Sure. What is their postcode and phone number? Sentence11: The postcode is cb46az. The phone number is 01223420060. Can I help you with anything else? Sentence12: That all thank you very much for all your help. Sentence13: Thank you! Now I need some suggestions on places to go in that same area of town. Sentence14: saigon city is one of the best places in town. Shall I book it for you ? Sentence15: Are you sure there are no restaurants that serve Australian food in the north that has an expensive price range? Sentence16: i need to eat australian food in a place that is expensive Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System