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: Does it have four stars? Sentence2: No I would like to stay in the centre. Can you recommend a cheap one in that area instead? Sentence3: Great. Thanks so much. Can you also get me a taxi from the Alexander B&B to Dojo Noodle Bar and get me there by 11:00? Sentence4: The address is 56 Saint Barnabas Rood, and they do have free parking. Sentence5: I don't have a preference for food type. I do need reservations for 8 at 12:00 on thursday. Sentence6: The City Room Hotel meets your requirements. Do you need the phone number? Sentence7: The Alexander Bed and Breakfast has 4 stars and is within your price range. Would you like me to book that for you? Sentence8: Booking completed! Booked car type : grey toyota Contact number : 07149685492 Sentence9: I'm sorry, it only has 0 stars. Would you like to try a different part of town? Sentence10: Yes, how about 11:00 instead? Sentence11: There are over 110 entries that fit the area and price range, what food type did you have in mind? Sentence12: Okay you have reservations at dojo noodle bar and your reference number is WJJDIBTF . Sentence13: That booking was unsuccessful. Could you do another time? Sentence14: I'm looking for a moderate place to stay in the centre. Sentence15: what their address? do they have free parking? Sentence16: Thank you and enjoy your visit to cambridge. Have a great day. Sentence17: Ok, thank you, that will be all. Goodbye Sentence18: Great can I also find a restaurant in the centre of town in the cheap price range? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User