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 thing but first can you tell me what kind of food you like? Sentence2: There number is 01223307402 Sentence3: Pizza Express in the centre, would you like me to make you a reservation? Sentence4: Yes, I would like some places to visit while I'm in town. Perhaps something in the same area as the restaurant. Sentence5: Your taxi has been booked. It will be a red Skoda and their contact number is 07842186730. Sentence6: No thank you. I just need the post code for now. Sentence7: How many people in the taxi? Sentence8: cb21db. Is there anything else? Sentence9: Thanks so much! That is all I need. Have a good day! Sentence10: Can you recommend a restaurant in the center of Cambridge that has moderate prices? Sentence11: Can I get their phone number please? Sentence12: May I suggest the Castle Galleries, it's a museum also in the centre area. Admission is free. Sentence13: Thank you have a great day! Sentence14: I would like Italian food. Sentence15: I also need to book a taxi to get from the restaurant to the museum. I plan on leaving the restaurant by 14:00. Sentence16: It is just me by myself Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System