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: Yes, for 6 people, and I will need the reference number please. Sentence2: There are about 70 options. Do you have a particular travel day? Sentence3: I found it, it's a cheap guesthouse in the west. Would you like me to book it for you? Sentence4: Your reservation is confirmed. Your reference number is 31S3UK6M . Can I help with anything else? Sentence5: Hi, I'm looking for a train that's going to bishops stortford from cambridge, what kinds of options are there? Sentence6: Yes for 6 people for 5 nights starting saturday. Sentence7: Thanks, I also am looking for a hotel called finches bed and breakfast a friend mentioned. Sentence8: I would like to travel on Thursday and get there before 13:30. Sentence9: No, that is everything I need. Thank you for all your help! Sentence10: I got 6 tickets for you your reference number is ADZ8DIQ2 . Sentence11: Train TR2929 leaves Cambridge at 11:29 on Thursday and arrives at Bishops Stortford at 12:07. Would you like me to book it for you? Sentence12: If there is nothing else you need help with, have a great day. Goodbye. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User