<|start_header_id|>user<|end_header_id|> Extract the phone number from the following sentence. If there is no phone number, please type 'no phone number'. : 10:15, Robert Johnson, 789 Oak Lane, 555-456-7890<|eot_id|> 
<|start_header_id|>assistant<|end_header_id|>555-456-7890<|eot_id|>