You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to travel from DCA to CLT. Can you help me to book a flight ticket?

ASSISTANT: Sure I will help you. Please help me with your name.

USER: I am Joshua Martinez.

ASSISTANT: Please let me know with your planned travel dates.

USER: I want to fly in the flight on Feb 04 and Feb 06.

ASSISTANT: Do you need a direct or connecting flight?

USER: I am looking for a connecting flight.

ASSISTANT: Please help me with your preferred class to fly.

USER: I want to travel in business class.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Please allow me a minute.

USER: Ok, take your time.

ASSISTANT: Joshua Martinez, I am really sorry to inform you that there are no flights available for your journey.

USER: That.

ASSISTANT: Thank you for reaching us. Have a great time.