You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need you to book my flight ticket from IAH to DFW, can you please help me?

ASSISTANT: Sure, could you please mention with your dates of journey?

USER: Thank you. I have to depart in the afternoon on Oct 22nd and return back on Oct 24th.

ASSISTANT: May I know your name please?

USER: My name is Joseph Brown.

ASSISTANT: Are you looking for any other help from my side please?

USER: I am looking for a direct flight.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome.