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: How about the one that is in the type of guesthouse? Sentence2: Could you please specify a precise time you would like to leave. Sentence3: The phone number for A and B Guest House is 01223315702. The address and postcode is 124 Tenison Rd, cb12dp. It is a 4 star guesthouse. Sentence4: Can I have the information for the guesthouse that doesn't have free parking? I would like the phone number, postcode and star rating please. Sentence5: Early evening please. Sentence6: I'm also looking fore a moderately priced hotel that has free wifi on the east side. Sentence7: Close to arriving by 21:00. I need to book it for 8 people for a Saturday. Sentence8: Thank you for using our system! Sentence9: Thanks! I think that's all I need. Sentence10: TR6759 leaves Stevenage at 19:54 and arrives in Cambridge at 20:43. Would you like me to book it? Sentence11: I have many options available. May I have the departure site please? Sentence12: I'm sorry, there aren't any hotels that match your criteria. Would any other area, price, or internet availability be acceptable? Sentence13: There are 70 trains departing to Stevenage. What day would you like to leave? Sentence14: I have several trains that will arrive in Cambridge by 21:00 what time of day would you prefer to depart? Sentence15: Yes, I'd like 8 tickets please. May I also have the reference number? . Sentence16: I would like to leave on Saturday and would like to arrive by 21:00 to cambridge. Sentence17: I am departing from Stevenage. I need to book seats for 8 people to Cambridge on a Saturday to arrive by 21:00. Sentence18: There are 3 guesthouses available, 2 of them have free parking. Sentence19: I'm looking for a train to Stevenage, please. Sentence20: Your booking was successful. The reference number is IQC4RP3I, and the total cost will be 81.92 GBP. What else can I help you with? Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User