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: Thank you for contacting Cambridge TownInfo Centre, have a great day! Sentence2: I would like to go to london liverpool street on Thursday. I would like to leave after 16:00. Sentence3: Yes, I also need to find a train leaving from cambridge. Can you help me with that? Sentence4: Glad I could help you. Have a nice day. Sentence5: Thank you, you as well, goodbye. Sentence6: That's fine, could you give me the address for the gallery please? Sentence7: Thank you! You have a nice day as well. Sentence8: Absolutely, where would you like to go? Sentence9: Goodbye to you as well. I hope you have a wonderful day. Sentence10: Great! I think that is all I need. I appreciate your help today. Sentence11: There are 4 trains that run during that period, do you have a preference for your arrival time? Sentence12: Yes, but I am unable to make a booking for you. Would you like to do anything else? Sentence13: Booking was successful, the total fee is 83 GBP payable at the station . Reference number is : IG0M4C9S . Sentence14: Hi, could you tell me if Cambridge Book and Print Gallery is still open? Sentence15: Just any time leaving after 16:00, and I need tickets for 5 people. Sentence16: The address is 49 newnham road, is there anything else I could do for you? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User