You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: Can you please reserve me a flight ticket from DFW to ATL?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned journey dates?

USER: My trip dates are Aug 13 and Aug 15.

ASSISTANT: Can I know your name?

USER: I am Angela Green.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you.