You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: Please help me out in booking the ticket from LGA to DCA.

ASSISTANT: I am here to help you about that, can you please let me know your planned dates of journey?

USER: My trip dates will be Jun 15 to Jun 17.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I need a direct flight.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: Larry Hall.

ASSISTANT: Sorry Larry Hall, there are no flights to your region on your planned dates of journey.

USER: That's ok, thank you.

ASSISTANT: You are welcome, thank you for reaching us.