You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Can you check to see if either has booking for 5 people at 17:15 on monday? Sentence2: Can you help me find a moderately priced place to eat located in the centre? Sentence3: I have 2. The varsity restaurant and bloomsberry. Both serve international food and are in the moderate price range. Do you have a preference? Sentence4: Good bye to you, let us know if you need us again. Sentence5: Thank you and goodbye Sentence6: Yes, do any serve international food? Sentence7: Neither are available at that time. Would you like to try a different time? Sentence8: I was able to book you for the yippee noodle bar, your reference number is E6ERFBKG Sentence9: Certainly, there are many restaurants that fit that criteria. Do you have a food type preference? Sentence10: No, I need 17:15 on Monday. Perhaps a different restaurant in the centre with moderate prices? Any cuisine is fine. Question: Who has spoken the sentence 7? (A) User (B) System
A:
Answer: (B) System