You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I have a plan to visit Washington. Can you help me in booking flight ticket from ATL to DCA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are July 21 to July 23.

ASSISTANT: Do you have any limits on maximum of connections?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: Myself John Davis.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey dates.

USER: Ok, no problem. I will choose alternate way to reach my destination. Thank you.

ASSISTANT: Welcome, thank you for reaching us.