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: The Alpha-Milton Guest House is in the north part of town at 63 Milton Road. Their postcode is cb41xa. Need anything else? Sentence2: I'm sorry, I haven't found a guesthouse that meets those requirements. Could you possibly stay at a higher rated place, or try a hotel room? Sentence3: Please show me a guesthouse with the lowest available rating. Sentence4: I'd be happy to help you. There are 24 guesthouses to choose from. Is there an area you'd like to stay in, or perhaps a certain price range? Sentence5: I'm sorry, there are no hotels that meet those criteria, either. Would you like to try different star ratings? Sentence6: Well, how about a moderate price range and a star rating of zero? Oh, and I don't need free parking. Sentence7: Yes, hi. Would you be able to suggest a reasonably priced guesthouse for our stay in Cambridge? Sentence8: There is no results for that match Sentence9: No, I'm looking for a hotel with 0 star rating and moderately priced. Sentence10: I'm sorry, I haven't found a guesthouse that meets those requirements. Could you possibly stay at a higher rated place, or try a hotel room? Sentence11: Yes that will work. I'll need the area, postcode and address, please. Sentence12: I'd like to visit a nightclub. Sentence13: The alpha-milton guest house is in the north with 3 stars, but there's no wifi nor parking. Will that suffice for you? Sentence14: Yes, I think there's been some confusion. Let's go back to lodgings for a moment. With no 0-star guesthouses with moderate pricing, how about a hotel instead? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System