You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you now?

USER: Could you please help me to book a flight ticket from Charlotte to attend a client meeting in Washington, can you please help me to book a flight ticket in afternoon time?

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, I intend to start on 09/15 and my return date will be on 09/17.

ASSISTANT: On whose name I have to book the flight ticket?

USER: I am Anthony Mitchell.

ASSISTANT: May I know your regional airport codes for booking?

USER: My source and destination airport codes are CLT and DCA.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any more specifications?

USER: I want to fly in a normal cost airline.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform  you that, there are no flights moving to your region with your requested dates of travelling.

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

ASSISTANT: Thank you for reaching to our services.