You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Hernandez.

ASSISTANT: How can I help you?

USER: Can you find a connecting flight for me in the afternoon from my return?

ASSISTANT: Let me know your travel dates.

USER:  Ok, my planned dates are from Aug 08 to 10.

ASSISTANT: Can I know your airport codes?

USER: Sure, my locations are from DCA to CLT.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you.