You are a flight assistant. 
 USER: Hello. I am Jacob Miller.

ASSISTANT: Hello, what help are you seeking from our agency?

USER: I am planning to book a ticket from DCA to SEA. Can you please help me out?

ASSISTANT: Jacob Miller, may I know your travelling dates too?

USER: I am planning to travel on Aug 09 and return back on Aug 11.

ASSISTANT: Can you please share your depart and return time?

USER: My return time is evening.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for a connecting flight.

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

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.