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: Yes, I will need a taxi to go between the two places. Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : PURZ5YVG . Is there anything else I can help you with? Sentence3: Yes please. I need it for 5 people for 4 nights staring from Thursday. Sentence4: The acorn guest house is a nice guesthouse. Would that work? Sentence5: I would also like more info about Pizza Hut in the city center. Sentence6: Depart the hotel and arrive at restaurant by booked time. I need car type and contact info Sentence7: I am looking for a good hotel in north Cambridge. Sentence8: Please specify for the taxi which location you'll depart from and which is the destination. Also I need a time to leave at or arrive by Sentence9: Does it have a 4 star rating? I would like a place with four stars? Sentence10: Yes it does. Would you like to book? Sentence11: The booking was successful. Your reference number is : A9VM6FAU . Is there anything else I can do to assist you today? Sentence12: Yes, I want a reservation for thursday at 19:30 and 5 people. Give me the reference number please. Sentence13: Can I help you with anything else? If not, goodbye have a nice day Sentence14: There is a Pizza Hut on Regent Street City Centre. Would you like me to make a reservation for you? Sentence15: Thank you very much. Sentence16: I have made that booking for you. It will be a white ford and the contact number is 07171542462. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User