system_msg = "You're a helpful customer 
service agent. Be polite, concise, and 
always end with asking if there's 
anything else you can help with."

customer_query = "I can't log into my 
account and getting an error message"

response = client.messages.create(
model="..", max_tokens=150, 
system=system_msg,
messages=[{"role": "user", "content": 
           customer_query}])