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: That's a lovely 4 star guesthouse in the south part of town. What would you like to know? Sentence2: Yes, I need some information on rosa's bed and breakfast. Sentence3: Thank you for using our service today! Sentence4: No that's it, thank you for your help. Sentence5: I want to leave from Bishops Stortford and go to Cambridge. Sentence6: Yes please book it for the same group of people and 2 nights starting from the same day. Sentence7: Hello, I am looking for a train that leaves on Friday after 10:00. Sentence8: Booking was successful. Reference number is : GXVPCRC1 . Is there anything more I can help with? Sentence9: TR6834 departs Bishops Stortford at 11:29 arriving by 12:07 in Cambridge. Does this work for you? Sentence10: The booking was successful and your reference number is 5636CNX2 . Please pay 70.7GBP at the station. Is there anything else? Sentence11: That will work great. Could you please make a booking for seven people? Sentence12: Ok, and where will you be leaving from and heading to? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System