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: Sure, do you prefer the west or the centre part of Cambridge? Sentence2: loch fyne is an expensive place that serves sea food. can we book? Sentence3: Okay I have done that and their reference number is H2OPFSBQ . Sentence4: Thanks, lastly, I need a taxi to take me to the restaurant from the hotel, I want to get there before the booked time. Sentence5: Thank you, have a nice day. Sentence6: I'm also looking for a place to eat in the city centre. maybe bistro food? Sentence7: The cambridge belfry is available. Would you like me to book you a room? Sentence8: I don't care about the area but I need it to be cheap with free wifi. Sentence9: Sorry there are no restaurants in the centre of town serving bistro food. Sentence10: You're welcome. And thank you, you, too! Sentence11: Your taxi will be a red audi. Should you need to contact them, the number is 07971260313. Sentence12: Can you help me find a 4 star hotel to stay at? Sentence13: Done! Your reference number is CU4LPL6C . Do you need help with anything else? Sentence14: Yes. Let's say 15:00 on the same day, with the same group of people. Sentence15: Yes, please. I need four nights starting Sunday, for two people. Sentence16: Okay. What about one that serves seafood instead? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System