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 want to book it for 5 people for 2 nights starting on thursday. Sentence2: Thank you! I'm also looking for a train departing from cambridge that leaves on saturday. Sentence3: Hello, we are looking for information about lodgings in Cambridge. Price is no option and we would like a very nice hotel. Sentence4: Okay, you are all set! Reference number is : RGBB7MTN . Sentence5: As long as its insanely expensive and has free parking. Centre located please. Sentence6: Okay, have a good day. Sentence7: I am not sure how many yet. For now, I need the departure time and the length of travel time for TR0823. Sentence8: The departure time is 10:01 and the duration is 60 minutes. Sentence9: I would recommend the university arms hotel. It is in the centre, expensive, and has free parking. Can I help with anything else? Sentence10: TR0823 will have you arriving at 11:01. How many tickets do you need? Sentence11: There are 33 hotels available, do you have any other criteria to narrow it down? Sentence12: What is your destination please and travel time? Sentence13: Ok, that's all I need for now. Thanks, bye. Sentence14: I'm heading to Broxbourne, and I need to arrive by 11:15. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User