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: city centre north b and b is a nice guesthouse, would you like me to book you? Sentence2: No but if you can, please get me their phone number and I'll take it from there. Sentence3: Great, thank you! Sentence4: Can you help me find a room in the north part of town? Sentence5: Can you suggest one please? Sentence6: Thank you so much for all your help. Sentence7: I was able to book a table that they will hold for you for 15 minutes. Reference number is : MN02CWCF . May I assist you with anything else? Sentence8: Thank you for using our service today! Sentence9: I need free parking but other than that I'm not picky. Sentence10: Their number is 01223312843. Sentence11: There are thirteen room options in the north part of town. Do you have any preferences that can help narrow down the options? Sentence12: Yes please, a table for two at 17:15 on Friday. Sentence13: what is the type of food that you prefer? Sentence14: North American food please. Sentence15: The Gourmet Burger Kitchen is a perfect option for you. Would you like to book a table there? Sentence16: ok, i have eleven options for you. Sentence17: city centre north b and b has been notified that you are calling them shortly. Sentence18: How's it going? I'm looking for an expensive restaurant in the centre please Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System