You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking flight ticket from DCA to DFW?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Yes, my travelling dates are Dec 02 and Dec 04.

ASSISTANT: Do you require any stopovers in your journey?

USER: No, I need a direct flight.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I want to return in the afternoon.

ASSISTANT: Please share your name.

USER: My name is John Hernandez.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.