You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Robinson.

ASSISTANT: How may I assist you?

USER: I want to travel on these days that is on Aug 02 and return on Aug 04. Can you make a reservation for me?

ASSISTANT: Sure, I can help you and may I know your planned travel dates?

USER: I have already mentioned above.

ASSISTANT: May I know your regional airport codes?

USER: My planned  airport codes are from DFW to CLT.

ASSISTANT: Is there any other criteria that you need?

USER: Yes, I need a single connecting flight.

ASSISTANT: Thank you for your information, there is no flight found on your journey dates to book a ticket.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: You are most welcome and thank you for reaching us.