You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Mitchell.

ASSISTANT: How may I guide you now?

USER: Can you help me in booking a flight ticket from DEN to DCA?

ASSISTANT: Margaret Mitchell, may I know your depart and arrival timings?

USER: My departure time is morning.

ASSISTANT: Do you need a direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry to say, there are no flights available for your journey.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for connecting with our services.