You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Thomas Thomas. Can you please help me in booking a flight ticket from DCA to CLT?

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

USER: My journey dates are from May 31 to June 02.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My return time is evening.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I prefer to travel in connecting flight.

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

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.