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 have the TR1612 that leaves friday at 9:11 and will arrive at 9:58. Would you like me to book that? Sentence2: Yes, I am also looking for a 3 star guesthouse that's moderately priced and has wifi. Sentence3: The phone number is 01223247942 and postcode is cb28rj. Can I help you with anything else today? Sentence4: Arrive by 10:45. Sentence5: You're welcome, have a great stay. Sentence6: I am traveling from Kings Lynn to Cambridge. Sentence7: What is its address? Sentence8: Yes please book for 1 person and provide me with the reference number. Sentence9: The bridge guest house. Is there anything else I can help you with? Sentence10: You have 3 choices: one in the south, one in the north, and one in the west. Would you like to book a room at one of these? Sentence11: Okay, we have 19 trains leaving on friday. Do you have any times you wish to leave and arrive by? Sentence12: I'm looking for a train that leaves on friday Sentence13: No, that should be all. Thank you! Sentence14: I have several trains leaving on that day. Where are leaving from and your destination? Sentence15: What's the name of the one in the south? Sentence16: I booked it for you. Your reference number is GWME416R . Is here anything else I can help you with today? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User