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: Where will you be departing from, and what is your destination? Sentence2: Is there an exact address, like a street number? Thanks! Sentence3: Great. Thanks for all your help! Sentence4: It has been booked. Your total fee is 37.79 GBP, which is payable at the station. Your reference number is 2X743C2D . Sentence5: Yes, can you book it for 1 person, please? Sentence6: Yes, I'm also looking for a train that leaves on Friday after 11:15. Sentence7: The TR3877 leaves at 12:09 on Friday. Would you like me to book it for you? Sentence8: It is on Saint John's Street, though it doesn't have an exact street number. Is there anything else you would like to know? Sentence9: Saint John's College is in the Centre of town on Saint John's Street. The entrance fee is 2.50 Pounds. Can I help you with anything else? Sentence10: You're welcome. Have a good day! Sentence11: cambridge is my destination and from leicester Sentence12: Can you help me find information on saint john's college? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System