You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: I am Lisa Davis, want to travel from LAX to DCA.

ASSISTANT: Sure, I can help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My travelling dates are from 03/27 to 03/29.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure. Please check the flight with price 200.

ASSISTANT: Sorry there is no flights available as per your requested budget limit.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.