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: Alright, have a nice day. Sentence2: I am departing from Cambridge and would like to be in Birmingham New Street by 20:45 at the latest. Sentence3: A later train would be better, what trains arrive around 20:00? Sentence4: The earliest train available is train TR4975 which departs at 5:01 and arrives at 7:44. Can I book that for you? Sentence5: Cafe jello gallery's post code is cb30af. Sentence6: That would be train TR5867 departing at 18:01 and arriving at 20:44. Would this work better for you? I can help you book this one if you like. Sentence7: Where are you leaving from? Sentence8: I'm also looking for a train that goes to Birmingham New Street and leaves on Saturday Sentence9: Greetings, I am looking for a museum to visit on the west side of town. Sentence10: The closest arrival to 20:00 is TR2815, departing at 18:01 and arriving at 19:44. There is also one arriving at 20:44. Would that be preferable? Sentence11: Can I get the postcode for that museum please? Sentence12: That won't be necessary. Thank you for your help that is all I need today. Sentence13: You can find the cafe jello gallery at 13 magdalene street and it's free! Sentence14: What is the departure time for the one arriving at 20:44? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System