You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for the day?

USER: Can you aid me in booking a flight ticket from CLT to DCA?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Myself Michael Lopez.

ASSISTANT: Please let me know your connection limit?

USER: Ensure it is a direct flight.

ASSISTANT: Ok, Could you please help me with your trip dates?

USER: Sure, I would like to go on May 15th and return back on May 17th.

ASSISTANT: Do you have any class preference?

USER: Any class is fine for me.

ASSISTANT: Is there any more specifications?

USER: No, I don't have any specifications.

ASSISTANT: Ok, please wait for  a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available on your route as per given requirements.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for availing us.