You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Myself Gary Clark.

ASSISTANT: Ok.

USER: I need to travel Charlotte, can you please reserve flight ticket from DFW and CLT?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are Feb,07 and Feb,09.

ASSISTANT: I am sorry, there are no flights available.

USER: That's ok, thank you for searching flights.

ASSISTANT: Thank you, have a good day.