You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: Myself Barbara Garcia. I need to travel Washington DC, can you please reserve flight ticket from CLT and DCA?

ASSISTANT: Ok, please tell me your travelling dates for this journey.

USER: My travelling dates are June,28 and June,30.

ASSISTANT: Barbara Garcia, do you need a connecting flight?

USER: Yes, I need a connecting flight for my journey.

ASSISTANT: May I know your depart time?

USER: My depart time is in the evening.

ASSISTANT: Sorry to say, there is no flight available for your journey.

USER: That's ok, I will choose any other source to travel my destination.

ASSISTANT: Thank you for reaching our services.

USER: Thank you for searching the flights.

ASSISTANT: Have a nice day.