You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from JFK to DFW, can you help me?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My travelling dates are 27 and 29 of Sep.

ASSISTANT: Can I have your good name please?

USER: I am Stephen King.

ASSISTANT: May I know your class and airline preference please?

USER: No, I need a direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I don't have any specifications.

ASSISTANT: Sorry to inform you that there are no flights available with your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.