You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to attend an interview on Aug 04, can you avail me a flight ticket?

ASSISTANT: Yes, can you tell me your nearest airport codes?

USER: My airport codes are DFW to CLT.

ASSISTANT: Can you share me your return date?

USER: I intend to catch return flight on Aug 06.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: I prefer to return in the evening time, can you please recheck?

ASSISTANT: Sorry, no flight found.

USER: Ok, no issues.

ASSISTANT: Can I know your name?

USER: I am David Wilson.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.