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: Thank you for using Cambridge TownInfo centre! Have a great rest of your day! Sentence2: Of course! I just booked the room for you for 5 days beginning on Friday. The reference number is 7WB751AK . Is there anything else I can help you with? Sentence3: i'm looking for adc theatre Sentence4: it is an expensive hotel in the centre with free wifi and parking. do you need their contact? Sentence5: Well, I'd like to book a room for 5 people, beginning on Friday for 5 days. Can you help me with that? Sentence6: Thank you very much, I think that that will be all! Sentence7: You will want to go to the centre part of Cambridge, it is on park street, postal code cb58as. Can I help with anything else? Sentence8: Yes, I need information about the Gonville Hotel, please. Sentence9: ADC Theatre is a theatre in the center part of town. Their phone number is 01223300085. Can I help you with anything else? Sentence10: I'm looking for information on the adc theatre. Can you get some information for me, including the attraction type? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System