You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: You're welcome and thanks for using our help desk. Goodbye. Sentence2: Sounds great! Can you help me book a reservation for 4 people on Sunday? Sentence3: 16:15, please, thank you. Sentence4: The Gardenia restaurant is a great choice. It is not expensive, and meets your other criteria. The address is 2 Rose Crescent City Centre Sentence5: No that is all. Thank you for the help. Sentence6: What time would you like the reservation to be for? Sentence7: You are booked, with ref # WBB6XXRP . Anything else for you today? Sentence8: I'm looking for a place to dine. The restaurant should be in the centre and should serve mediterranean food. Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System