You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you at this moment?

USER: I need to book a flight ticket from CLT to DCA, Can you please help me for booking?

ASSISTANT: Sure, Could you please share your trip dates?

USER: I would like to travel no 03/27 to return on 03/29.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any more specifications?

USER: Yes, I would be return on evening.

ASSISTANT: May I know your good name to proceed further?

USER: Dennis Hill here.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.