You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to visit Dallas, will you help me in booking the flight ticket from LAX to DFW?

ASSISTANT: Sure, can you share your trip dates?

USER: My preferable journey dates are Feb 17 and Feb 19.

ASSISTANT: Do you prefer either connecting or direct flight?

USER: I need a flight with single connection.

ASSISTANT: Is there any class preference?

USER: No, thank you for asking.

ASSISTANT: Please forward your name.

USER: Myself Gary Roberts.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: There are no flights found on your specified trip dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.