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: I also need to know what the price range is for this restaurant. Sentence2: Not a problem! Have a great day now! Sentence3: Great! One of these trains should work, thank you and goodbye Sentence4: No. Just choose one and give me the phone number and address please. Sentence5: Um, one of what trains should work? Hello? Sentence6: No, instead I'd like to find a gastropub restaurant in the centre. Can you help me with that? Sentence7: Yes definitely. I have 3 to choose from. Some are expensive and one is in the moderate price range. Do you have preference/ Sentence8: I would like to depart stansted airport saturday and arrive in Cambridge by 12:00. Could you also let me know the cost? Sentence9: This restaurant is expensive. Can I help you with anything else? Sentence10: That will be all. Thank you for your help. Sentence11: I'm very sorry for the confusion, there are 19 trains travelling to cambridge on saturday, do you need to depart or arrive at any particular time? Sentence12: Hello, I'm traveling to Cambridge from Stansted Airport on Saturday and need to find a train. Sentence13: All trips arriving by 12:00 cost 8.08 pounds. Is there a specific time you would like to depart? Sentence14: No problem. The Backstreet Bistro is at 2 Sturton Street City Centre. They're phone number is 01223306306. Is there anything else I can help you with today? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System