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. Goodbye. Sentence2: I also need to find a train from ely to cambridge. Sentence3: Is the travellers rest restaurant still open? Sentence4: I will be traveling on Sunday. Sentence5: lad we could help, call back soon! Sentence6: I'd like to arrive by 08:15. Please select the first option that comes up and book for 6 people, then send me the reference number Sentence7: Alright I have 10 trains. Please tell me when you want to leave or arrive Sentence8: Thank you for using our services. Have a great day! Sentence9: The booking was successful and your reference number is CKRJK7NI . Sentence10: Let me narrow down the choices. What day will you be traveling? And, what time do you want to arrive or depart? Sentence11: Can I book a table for six people on Sunday? At 12:15? Sentence12: It appears that they are open, but their number is 01223276182 to verify. Does that help? Sentence13: That is all I needed, thank you! Sentence14: Reference number is : 7WXPZ42X . Anything else? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System