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 need a theatre in the centre of town. Sentence2: Sure, I also need a train that leaves from Cambridge and arrives by 16:45. Sentence3: Yes please book that for 2 people. Sentence4: The postcode is cb58as. Unfortunately, the entrance fee is unknown. Would you like the phone number so you can call them to ask? Sentence5: Sure, your reference number is LGM5AGUR . Is there anything else I can do for you? Sentence6: Of course, have a great day. Sentence7: Well, I need to arrive by 16:45, and want to depart from Cambridge. Does that one match my request? Sentence8: I found one that leaves at 05:21 would that work for you? Sentence9: Yes it does, it's train TR2025 if you'd like to book. Sentence10: No, I think that covers it all, thanks for your help. Sentence11: I would like to travel to Leicester on Sunday. Can you arrange this trip? Sentence12: I found four theaters. Would you like to try the ADC Theatre? Sentence13: That sounds good, I need the postcode and the entrance fee as well please. Sentence14: Adc theatre's phone is 01223300085. There are 819 trains departing cambridge. Could you be more specific on your destination and what day you'd like to leave on? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User