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: You are very welcome. Thank you for using our service. Sentence2: What an interesting name! Hmm, what do you have in the way of seafood restaurants? Sentence3: You are welcome. Goodbye! Sentence4: Of course! It's a college in west Cambridge at Trinity Lane cb21tl with phone number 01223333200. The entrance fee is 2.50 pounds. How else may I assist you? Sentence5: Lock Fyne is what you're looking for. They're at The Little Rose 37 Trumpington Street. Would you like me to book you a table? Sentence6: You've told me everything I need to know. Thanks! Sentence7: I would like to visit Clare College. Can you give me more information on it? Sentence8: Im looking for a expensive restaurant in the centre. Can you assist? Sentence9: There are more than 30 of them. Did you have a cuisine in mind? If you're in a mood for a gastropub I can recommend The Slug and Lettuce. Sentence10: No thanks that's all I needed thank you for your help. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User