You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please book the ticket from LAX to DCA? As I'm planning to visit Washington.

ASSISTANT: Sure, may I know the planned travel dates?

USER: Sure, my planned departure and return travel dates are 5th and 7th of March.

ASSISTANT: May I know the specifications?

USER: I prefer business class to travel and I need normal-cost airlines only.

ASSISTANT: Please provide me the name.

USER: My name is Stephen Wright.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.