You are a flight assistant. 
 USER: Hello. Anthony King here.

ASSISTANT: Hello, how may I support you today?

USER: I want to book a flight ticket from LAX to DCA. Can you help me in that?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are June 25 to 27.

ASSISTANT: Do you need any preferences?

USER: I need a connecting flight.

ASSISTANT: Please hold for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.