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: It seems there are thirteen trains to Broxbourne arriving by 19:00. What time would you like to leave? Sentence2: Let's book a train, I'll be departing from cambridge and going to broxbourne. Lets look for something on wednesday arriving in broxbourne by 19:00. Sentence3: Thanks! Now I need to find a Lebanese restaurant in the expensive price range. Can you help me find one? Sentence4: We're not picky, please book any train arriving in Broxbourne by 19:00 for 4 people. Sentence5: Is there any in the East? Sentence6: I'm afraid there isn't an expensive Lebanese restaurant in the city. Sentence7: Thanks for all your help. I think I'm good now. Sentence8: There are 4 indian restaurants in the east. Did you have a preference on price? Sentence9: You're welcome, have a great day! Sentence10: I'd like someplace expensive, please. Sentence11: Okay, your booking was successful. Your total fee of 71.59 GBP is payable at the station. The reference number is B5E7R2LE . Sentence12: What about one that serves indian dood? Sentence13: Unfortunately, the only Lebanese restaurant in town is moderately-priced. Would you like to book that restaurant or should I search for a different restaurant? Sentence14: I am planning a trip to Cambridge Sentence15: I am definitely assist with planning that trip. Do you want to start with booking a train, or search a restaurant? Sentence16: I have 2 that are expensive. May I suggest Sitar Tandoori? Would you like to book that? Sentence17: Yes, I need a table for 4 people at 10:15 on Wednesday, if that day is not available then try Friday and provide the reference number. Sentence18: Booking was successful. The table will be reserved for 15 minutes. Reference number is : UYGNM1SV . Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User