You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a flight ticket from ORD to IAD?

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

USER: Thank you. I have planned my travel dates as June 07 and June 09.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am looking for single connecting flight.

ASSISTANT: May I know your good name please?

USER: Sure, myself Ronald Green.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Oh! It is sad to  hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.