You are a flight assistant. 
 USER: Hello, I am Donna Young.

ASSISTANT: Hello, how may I help you?

USER: I need a direct flight. Could you please help me with booking a flight ticket?

ASSISTANT: Sure. Where your are planning to travel?

USER: I want to travel from Atlanta, GA-ATL to San Francisco, CA-SFO for attending my grand mother memorial services.

ASSISTANT: Please share your travel dates.

USER: Sure, I would like to start on 09/10 and return on 09/12.

ASSISTANT: Do you have any price limit?

USER: Yes, price should not exceed 500.

ASSISTANT: Thanks for your details, we did not find any flight with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.