You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from LAX to ORD?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travel dates are Mar 25 to Mar 27.

ASSISTANT: Can I have your name please?

USER: My name is William Adams.

ASSISTANT: Let me know your connection limit?

USER: I need a direct flight.

ASSISTANT: Any other requirements to be met?

USER: I prefer economy class.

ASSISTANT: Sorry, no flights found with your given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.