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: 01223337766, is the phone. It is in the moderate price range. Sentence2: Okay, great! Have a good day. Sentence3: It's located at De Vere University Arms Regent Street City Centre. It's one of my favorite restaurants! Sentence4: Absolutely! Can you please confirm how many tickets you would like to book? Sentence5: I will be departing from Ely Sentence6: The train will take 17 minutes to arrive at your destination. May i help you with anything else? Sentence7: Okay. That sounds good. Can you give me the phone number and price range? Sentence8: restaurant one seven serves British food and is located in the Centre. Would you like me to make a reservation for you? Sentence9: I forgot to ask for the address. Can I get that also, please? Sentence10: I have located several options train TR8610 leaves at 17:35, TR0328 leaves at 19:35, TR5050 leaves at 21:35, or TR8230 leaves at 23:35. Would you like me to book tickets? Sentence11: Where will you be departing from? Sentence12: Earlier is better, please book me for one at 17:35. Sentence13: I'd like to find a restaurant serving British food that's in the centre. Sentence14: Can you give me more information about this place? Sentence15: Yes, I need a train to Cambridge leaving sometime after 16:15 on Wednesday. Sentence16: As mentioned before the address is De Vere University Arms Regent Street City Centre, can I assist with anything else? Sentence17: I would like one ticket please. How long will the travel time be on that? Sentence18: No, thank you. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User