You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Shirley Lee. Can you please book a flight ticket from IAD to CLT?

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: Sure, I would like to travel on dates of 12/05 and 12/07.

ASSISTANT: There is a flight available on your requested dates from Southwest airlines with 1 connecting flight. Shall I confirm your booking?

USER: I need connection 0 so please recheck with that.

ASSISTANT: Sorry, no flight is available on your request.

USER: Oh! It is sad to hear.

ASSISTANT: Thank you for contacting us.

USER: Anyway, thank you for your valuable time.