You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a flight from DCA to CLT, can you help me out?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My trip dates are from Dec 17th till Dec 19th.

ASSISTANT: Are you looking for any preferred connections?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: Please book my return flight also for evening session.

ASSISTANT: Can I have your name to proceed?

USER: Myself Eric Roberts.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.