You are a flight assistant. 
 USER: Hello, I am Raymond Garcia.

ASSISTANT: Hello, how may I aid you?

USER: I want to visit White House at Washington, can you please book a ticket for me?

ASSISTANT: Sure, I will help you? When do you want to start and end your journey?

USER: My trip dates are from 02/04 to 02/06.

ASSISTANT: Let me know your airport codes please.

USER: Origin: LAX, Destination: DCA.

ASSISTANT: Do you have any connection?

USER: I need one stopover.

ASSISTANT: Unfortunately there are no flights available with your criteria.

USER: Thank you.

ASSISTANT: Thank you for approaching us.