You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I oblige you today?

USER: I am John Anderson. I have a plan to meet my friend in DCA, can you please find a flight from DFW?

ASSISTANT: sure, i am mirthful to help you in booking. Could you please share your travel dates?

USER: My planning dates are from 02/23 till 02/25.

ASSISTANT: Please allow me a moment, let m search a best flight for you.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, anyway thank you for your information.

ASSISTANT: Welcome, have a nice day.