You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to meet my new project manager at Washington. Can you please help me in reserving the ticket from BOS to DCA?

ASSISTANT: May I know your travel dates?

USER: I would like to travel on Apr 22 and again I will return back on Apr 24.

ASSISTANT: Do you have any connecting limit preferences?

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

ASSISTANT: Is there any other concern?

USER: No, I don't have any other concerns.

ASSISTANT: May I know your name please?

USER: Myself Alexander Williams.

ASSISTANT: No flights found as per your preferences at the moment.

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

ASSISTANT: Thank you for choosing us.