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 am not sure what day, I am just researching now. I would like to have a 4 star hotel. Are there any options? Sentence2: I have about 11 guesthouses that are available. Do you have a preference as far as area? Sentence3: It does have wifi! Will you need parking as well? Sentence4: Okay, I've booked you at the Avalon. Your reference number is ZG7G439M . Can I further assist you? Sentence5: Yes, I need a train to peterbourough on Sunday. Sentence6: Nope, that isn't important. Can you book it for 1 person for 3 nights starting on Thursday please? Sentence7: I can suggest the avalon located in the north it is moderately priced with 4 stars. Would you like to make reservations? Sentence8: I'm looking for a moderate priced place to stay with free wifi. Sentence9: There are several trains to Peterborough on Sunday. Where are you departing from and do you have a time in mind? Sentence10: does it have wifi? Sentence11: I do not have a preference on area. Sentence12: What day will you be arriving at the hotel and how long are you staying? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System