You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in reserving the ticket from DCA to EWR?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: I am planning my trip on Aug 21 and again I will return back on Aug 23.

ASSISTANT: May I know your name?

USER: Myself Cynthia Robinson.

ASSISTANT: Do you have any other specifications?

USER: I am planning to travel in single connection flight.

ASSISTANT: Ok, wait for some time.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thanks for approaching us.