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: Will you check to see if there are any in the north? Sentence2: There are no 2 star hotels in the west part of town. Would you like to expand the search to 2 star hotels in other parts of the city? Sentence3: No. I am leaving from Cambridge to go to Broxbourne. Sentence4: Train TR0189 arrives at 18:01. Should I reserve tickets for that one? Sentence5: Yes, I am looking for a 2-star hotel in the west part of town. Sentence6: Ok and I need a reference number please Sentence7: I will be leaving from Cambridge. Sentence8: I have the lovell lodge it is located in the north and is moderately priced with 2 stars. Would you like to reservations there? Sentence9: I'm sorry,I'm confused. You are leaving from Cambridge to go to Cambridge? Sentence10: Sure please make a booking for 4 people. Sentence11: I'm looking for a train on Tuesday to arrive in Cambridge by 19:00, can you help me please? Sentence12: sure, for the same group of people on sunday Sentence13: Booking was successful, the total fee is 71.59 GBP payable at the station . Reference number is : V7H3P3G7 . anything else? Sentence14: Sure! Where will you be departing from? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System