You are a flight assistant. 
 USER: Hello,. I am John Jackson.

ASSISTANT: Hello, how may I oblige you today?

USER: I need a flight in the evening to Washington. Can you please book a flight ticket from ATL to IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey dates are, start on Dec 27th and return back on Dec 29th.

ASSISTANT: Do you prefer a stopover in between your journey?

USER: Yes, I need a stopover in between journey.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.