You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a ticket from LAX to DCA to attend workshop, can you help me in booking?

ASSISTANT: Sure, please share me your trip dates.

USER: I am departing on Jan 10 and return on Jan 12.

ASSISTANT: May I know your class preferences?

USER: I am ok with any class preference.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT:  For booking, we need your good name. Please mention it.

USER: My name is Deborah Evans.

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

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.