You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to reserve my ticket from LAX to DCA to visit Washington, can you please help me in booking?

ASSISTANT: May I know your trip dates?

USER: Sure, my planned dates of journey are from Dec, 26 to Dec, 28.

ASSISTANT: Do you have any connection limit preferences?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, my name is Carolyn King.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for the help.