You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Solution: Answer: (A) User
Why? The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input: Sentence1: I don't have any upscale guesthouses available. Is there a different price range I can help you find? Sentence2: Sounds great. I need to be there Saturday and we will be staying 4 nights. Sentence3: How about the Alexander Bed and Breakfast in the centre? It is a cheap guesthouse with free WIFI. Sentence4: I am sorry, there is no availability for those dates. Would you like me to try to find another hotel? Sentence5: Have a great day! Good-Bye. Sentence6: I don't care about the area. All that matters to me is that it has free wifi. Sentence7: I'm looking for an upscale guesthouse. Sentence8: As long as my reservation is for 2 people, we are set. Thank you! Sentence9: Yes let's try another hotel in the same price range. Sentence10: Thank you so much for your help. Sentence11: Thank you so much. I'm sure I will. Sentence12: Okay great. Glad I could be of help. Enjoy your stay. Sentence13: Is there any in the cheap price range then? Sentence14: I was able to get you into the El Shaddai and your reference number is JG24DZVF . Sentence15: Is there anything else that you need today? Sentence16: Your are looking for an upscale guesthouse. I can help you with that. There are a few options, what area would you like? Question: Who has spoken the sentence 7? (A) User (B) System
Solution:
Answer: (B) System